InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your BITSAT knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
For the process, CO2(s) ⎯→ CO2(g) (a) both ΔH and ΔS are +ve (b) ΔH is +ve and ΔS is –ve (c) ΔH is –ve and ΔS is +ve (d) both ΔH and ΔS are –ve |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) both ΔH and ΔS are +ve</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Sublimation requires energy i.e., ΔH = +ve</span></span></p> | |
| 452. |
A full wave rectifier circuit along with the input and output voltages is shown in the Figure. The contribution to output voltage from diode-2 is(1) A, C (2) B, D (3) B, C (4) A, D |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (2) B, D</span></span></p> | |
| 453. |
Efficiency of a HW rectifier is nearly (1) 80% (2) 60% (3) 40% (4) 20% |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (3) 40%</span></span></p> | |
| 454. |
Which statement is wrong? (1) For SN2 reaction, order of reactivity of alkyl halides is 1° > 2° > 3° . (2) For SN1 reaction, order of reactivity of alkyl halides is 1° < 2° < 3° . (3) SN2 reaction takes place through carbocation formation. (4) SN1 reaction takes place through carbocation formation. |
| Answer» <p style="text-align:justify"><span style="font-size:16px"><span style="color:#000000"><strong><span style="font-family:Calibri,sans-serif">The Correct option is </span>(3) S<sub>N</sub><sup>2</sup> reaction takes place through carbocation formation.</strong></span></span></p> | |
| 455. |
The number of permutations of the word HINDUSTAN such that none of the three patterns HIN, DUS, TAN occurs is (1) 169194 (2) 166680 (3) 169190 (4) 166670 |
| Answer» <p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (1) 169194</strong></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">(a) Total number of permutations</span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= 9!/2 ,since N is repeated.</span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">(b) Number of permutations in which 'HIN' comes as a block = 7!</span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Number of permutations in which 'TAN' comes as a block = 7! Number of permutations in which</span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">'DUS' comes as a block = 7!/2</span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">(c) This includes both 'HIN' and 'TAN' comes as blocks = 5! same is true for the other two pairs. </span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">(d) Number of permutations in which all three blocks come = 3! </span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">∴ required number of permutations</span></span></p><p style="text-align:justify"></p> | |
| 456. |
If the graph of the function x2 − 4x + log3 a does not cut the real axis, then the least integral value of 'a' is (1) 80 (2) 81 (3) 82 (4) 0 |
| Answer» <p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option</strong></span></span><strong>(3) 82</strong></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The graph of the function x<sup>2</sup> − 4x + log<sub>3</sub> a </span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">does not cut the real axis. </span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">⇒ the roots of x<sup>2</sup> − 4x + log<sub>3</sub> a = 0 are imaginary. </span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">⇒ log<sub>3</sub> a > 4 ⇒ a > 81</span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">⇒ the least integral value of a is 82.</span></span></p> | |
| 457. |
The number of permutations of n different things, taken r at a time, in which P (r ≤ n − p) particular things will never occure is : (a) P (n − p, r) × P (n, n − p) (b) P (n, r) × P (n, p) (c) P (n, r) − P (n, p) (d) P (n − p, r) |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) P (n − p, r)</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Since p particular things out of n different things is never taken. So, we have to determine the number of ways in which r places can be filled with (n − p) distinct things. Clearly, the number of such arrangements is <sup>n − p </sup>P<sub>r</sub></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= P (n − p, r), where P (r ≤ n − p)</span></span></p> | |
| 458. |
Correct IUPAC name of the complex [Cr(H2O)4 Br2 ]Br ⋅ 2H2O is (1) Dibromotetraaquachromium (II) bromide diaqua (2) Tetraaquadibromochromium (III) bromide dihydrate (3) Tetraaquadibromochromium (III) hydrate bromide (4) Tetraaquadibromochromium (III) bromide |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (2) Tetraaquadibromochromium(III) bromide dihydrate</span></span></p> | |
| 459. |
Thermal radiations are electromagnetic waves belonging to : (a) ultraviolet region (b) visible region (c) gamma region (d) infra-red region |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) infra-red region</strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">We know that thermal radiations consists of larger wavelength as compared to gamma rays and wavelength in visible regions and so, thermal radiations belong to infra-red region.</span></span></p> | |
| 460. |
The unit of Poynting vector is (1) watt (2) watt m3 (3) watt/m2 (4) watt/m3 |
| Answer» <p><span style="color:#000000"><span style="font-size:16px"><strong><span style="font-family:Calibri,sans-serif; line-height:115%">The Correct option is (3) watt/m<sup>2 </sup> </span></strong></span></span></p> | |
| 461. |
A 60 watt bulb carries a current 0.5 amp. The total charge passing through it in 1 hour is : (a) 1800 coulomb (b) 2400 coulomb (c) 3000 coulomb (d) 3600 coulomb |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) 1800 coulomb </strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">The total charge passing through bulb is </span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">q = it ...(1)</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Here, i = 0.5 A, t = 1 hour</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">t = 1 × 60 × 60 sec t = 3600 sec</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">from eq. (i)</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"> = 0.5 × 3600 = 1800 coulomb</span></span></p> | |
| 462. |
The total number of injective mappings from a set with m elements to a set with n elements m ≤ n is equal to :(a) mn (b) nn(c) (n !/n-m) !(d) n ! |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong><span style="font-size:10pt">Correct option </span>n ! /(n -m) !</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong><span style="font-size:10pt">Explanation:</span></strong></span></span><span style="font-family:Arial,sans-serif; font-size:10pt"></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Let A = {a<sub>1</sub>, a<sub>2</sub>, … am},B = {b<sub>1</sub>, b<sub>2</sub>, …, bn}, and let f : A → B. The possible choices for f (a<sub>1</sub>) are n.</span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Having fixed f (a<sub>1</sub>), the possible choices for f (a<sub>2</sub>) are n − 1, and so on. Thus, there are</span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">n (n − 1) (n − 2) … (n − (m − 1)) = n !/(n -m) !</span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">injective mappings from A to B.</span></span></p> | |
| 463. |
Directions: In each question you find a set of sentences arranged in a haphazard way. Choose the correct arrangement of sentences as indicated by the number to make a coherent paragraph.A. Our leaders decided to move towards progress through five year plans. B. In the years that followed Independence, India had to tackle many problems. C. We have decided to be a democracy and we have continued to remain so. D. This path was laid down in the constitution we gave ourselves. E. Sixty years have gone by and we have grown as a nation in many ways. F. Leaders like Nehru and Ambedkar set the course our country was to take. (1) EFDCBA (2) BEACDF (3) BEDAFC (4) BDEACF |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong><span style="background-color:white">The Correct option is (1) EFDCBA</span></strong></span></span></p><p></p> | |
| 464. |
Each of the words is followed by four likely synonyms. One of them is not the correct synonym. Pick up that.Sorrow : (a) misery (b) unhappiness (c) beautiful (d) sadness |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (c) beautiful</strong></span></span></p><div><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></div><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Sorrow’s synonyms are misery, unhappiness and sadness while ‘beautiful’ has different meaning.</span></span></p> | |
| 465. |
Directions: Each question below has a word capitalised followed by four words or phrases numbered 1 to 4. Choose the word that has nearly the same meaning as the capitalised word. (a) CONJECTURE (1) magic (2) guess (3) position (4) farm (b) DECIMATE (1) kill (2) disgrace(3) collide (4) deride (c)TEPID (1) boiling (2) lukewarm (3) freezing (4) cold |
| Answer» <p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(a)</strong>(2) guess</span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(b)</strong>(1) kill </span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(c)</strong>(2) lukewarm</span></span></p> | |
| 466. |
Directions:Choose from among the alternatives given, the word which will substitute the underlined expression in each of the following questions and mark the same in your answer sheet.Our new computer has speeded up the progress of the companys billing operation. (1) extorted (2) expedited (3) exacerbated (4) elided |
| Answer» <p style="text-align:justify"><strong><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><span style="font-size:11pt">The Correct option is </span>(2) expedited</span></span></strong></p> | |
| 467. |
Directions: In each of the following questions a capitalised word is followed by four words numbered 1 to 4. Choose the word that is most opposite to the meaning of the capitalised word and mark your answer in the appropriate place in your answer sheet.(a)LETHARGIC (1) convalescent (2) beautiful (3) invigorating (4) interrogating(b)IRKSOME (1) interesting (2) lazy (3) tireless (4) devious (c)KINDLE (1) dislike (2) quench (3) gather (4) sparkle |
| Answer» <p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>The Correct option is </strong></span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(a)</strong>(3) invigorating</span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(b)</strong>(1) interesting</span></span></p><p><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(c)</strong>(2) quench</span></span></p> | |
| 468. |
Which material among the following possess excellent dielectric properties and good reliability for use in making capacitors?(1) Silicon monoxide(2) Silicon dioxide(3) Tin oxide(4) Chromium oxide |
| Answer» <p></p><p style="text-align:justify"><strong><span style="color:#000000">The Correct Option is </span>(2) Silicon dioxide</strong></p><p></p> | |
| 469. |
There are n different books and m copies of each in a college library. The number of ways in which a selection of one or more books is : |
| Answer» <p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) (m + 1)<sup>n</sup> − 1</strong></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">In the case of each book we may take 0, 1, 2, 3, ... m copies. </span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">∴ We may deal with each book in (m + 1) ways and therefore with all the books in (m + 1) n ways. But this includes the case where all books are rejected and no selection is made. So, the number of ways in which selection can be made </span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= (m + 1)<sup>n</sup> − 1</span></span></p> | |
| 470. |
The standard heat of combustion of carbon is –94.0 kcal hence, the heat of formation of CO2 will be : (a) –46.0 kcals (b) –26.0 kcals (c) –94.0 kcals (d) +94.0 kcals |
| Answer» <p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (c) –94.0 kcals </strong></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Given C + O<sub>2</sub> → CO<sub>2 </sub></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">ΔH = −94.0 kcals </span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">The equation represents heat of combustion of carbon as well as heat of formation of CO<sub>2</sub>.</span></span></p> | |
| 471. |
The number of common tangents to the circles x2 + y2 = 4 and x2 + y2 − 6x − 8y = 24 is (1) 0 (2) 1 (3) 3 (4) 4 |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct Option (2) 1</strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">x<sup>2 </sup>+ y<sup>2</sup> = 2<sup>2 </sup>and (x − 3)<sup>2</sup> + (y − 4)<sup>2</sup> = 7<sup>2 </sup></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">touch internally, d = r<sub>1</sub> − r<sub> 2</sub> = 5 </span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Number of common tangents = 1</span></span></p><p></p> | |
| 472. |
Direction: In each of the following questions a pair of words with certain relationship between them is given followed by four pairs numbered 1 to 4. Select the pair wherein the words have closest relationship to the original pair. (a) DRIVER : DRIVING :: (1) Carpenter : Wood (2) Garden : Plants (3) Counsellor : Counselling (4) Psychologist : Teaching (b) WATER : SWIM :: (1) Graze : Grass (2) Plan : Implement (3) Ground : Play (4) Knot : Tie(c) CANVAS : PAINTER :: (1) Leather : Shoe (2) Chisel : Wood (3) Hammer : Carpenter (4) Marble : Sculptor (d) ELEVATED : EXALTED :: (1) Promoted : Excellence (2) Purified : Hygienic (3) Dirty : Filthy (4) Disorderly : Unfaithful |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">(a)(3) Counsellor : Counselling</span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">(b)(3) Ground : Play</span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">(c)(4) Marble : Sculptor</span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">(d)(3) Dirty : Filthy</span></span></p> | |
| 473. |
In each of the following questions, choose the word with opposite meaning to the given word out of the given alternatives : Former : (a) later (b) latter (c) primer (d) subsequent |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (b) latter</strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"> ‘Former’ means first of the two things but ‘latter’ means second of the two things. </span></span></p> | |
| 474. |
In each of the following questions, choose the word with opposite meaning to the given word out of the given alternatives :Lend : (a) borrow (b) take off (c) pawn (d) hire |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) borrow</strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"> ‘Lend’ to grant but ‘borrow’ means to take. </span></span></p><p></p> | |
| 475. |
Directions: Each of the following sentence has a mistake in grammar usage or idiom. Each sentence is broken up into four parts sequentially 1, 2, 3 and 4. Choose the part which has an error and mark accordingly.(a) (1) She is a good (2) artiste who (3) can able to (4) dance and sing(b) (1) Each of the (2) six boys in (3) the class has (4) finished their task(c) (1) The teacher (2) observed that (3) the Earth (4) moved round the Sun |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is</strong></span></p><p style="text-align: justify;"><span style="color:#000000"><strong>(a)(3) can able to</strong></span></p><p style="text-align: justify;"><span style="color:#000000"><strong>(b)(4) finished their task </strong></span></p><p style="text-align: justify;"><span style="color:#000000"><strong>(c)(4) moved round the Sun</strong></span></p> | |
| 476. |
Directions: Some parts of each of the following sentences, have been jumbled up. Choose the correct sequence to rearrange these parts which are labelled P, Q, R, S so as to produce the correct sentence. (P) As things stand, but a majority still does not have access to English. (Q) linguistic edge they are equipped with (R) after globally because of the (S) Indian professionals are much sought (1) RSPQ (2) SRQP (3) RSQP (4) SRPQ |
| Answer» <p><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct option is (2) SRQP</strong></span></span></p> | |
| 477. |
Radio - isotopes are not used to(1) study plant metabolism(2) diagnose diseases(3) track the energetic radiation(4) non-destructive testing |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong>The Correct Option is (3) track the energetic radiation</strong></span></p><p></p> | |
| 478. |
A prism is used to resolve D1 and D2 lines of sodium. If µ for 6563 Å is 1,6545 and µ for 5270 Å is 1.6635, the minimum thickness of the base of the prism required is (1) 2.36 cm (2) 9.1 mm (3) 1.41 cm (4) 1.01 cm |
| Answer» <p style="text-align:justify"><span style="font-size:16px"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct option is (3) 1.41 cm </strong></span></span></span></p> | |
| 479. |
Electron (E), proton (P), helium nucleus (He++ ) and deuterium nucleus ( 2H+ ) all have charge as well as mass. The order in which they are arranged in increasing magnitudes of the value of charge to mass ratio is (1) E, P, He++ , 2H+ (2) P, He++ , E, 2H+ (3) 2H+ , He++ , P, E (4) He++ , 2H+ , P, E |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong><span style="background-color:white">The Correct option is (3) 2H<sup>+</sup> , He<sup>++</sup> , P, E</span></strong></span></p><p></p> | |
| 480. |
The positron has a charge equal to that of : (a) a proton (b) an α-particle (c) a neutron (d) an electron |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) a proton </strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Positron is anti-electron. It possesses the same magnitude of charge as proton.</span></span></p> | |
| 481. |
An inorganic substance liberates O2(g) on heating, turns acidified KI (aq) to brown colour solution and decolorise acidified KMnO4 solution. The substance may be(1) K2CrO4 (2) H2O2 (3) Cl2 (4) KClO3 |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><strong><span style="color:#000000"><span style="font-size:16px"><span style="background-color:white">The Correct option is (2) H<sub>2</sub>O<sub>2</sub></span></span></span></strong></p><p></p> | |
| 482. |
The intensity of cosmic ray is minimum at the equator. This is due to _______ of the earth. (1) atmosphere (2) spin motion (3) greenhouse effect (4) magnetic field |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The intensity of cosmic ray is minimum at the equator. This is due to <strong>magnetic field</strong> of the earth. </span></span></p> | |
| 483. |
The wave number equals to the number of waves (1) per kg (2) per second (3) per metre (4) crossing per unit area |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong>The Correct Option is (3) per metre</strong></span></p><p></p> | |
| 484. |
In an oscillator, the feedback can be done by a (1) transistor (2) rectifier (3) step - up transformer (4) step - down transformer |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong>The Correct Option is (4) step - down transformer</strong></span></p><p></p> | |
| 485. |
Adiabatic demagnetization of a substance (1) decrease the temperature (2) increase the temperature (3) increase the volume (4) decrease the volume |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (1) decrease the temperature</span></span></p> | |
| 486. |
In the frame of reference of a rotating turntable, an insect of mass m is moving radially outwards (+ x direction) with a speed v. If the turntable is rotating with a constant angular velocity ωk in the vertically upward direction, the net pseudo force on the insect, when it is at a distance from the axis of the turntable is given by (1) imω2 r + 2 jmωv (2) imω2 r − 2 jmωv (3) − imω2 r + 2 jmωv (4) imω2 r |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (4) imω<sup>2 </sup>r</span></span></p> | |
| 487. |
Two particles of masses m1 and m2 initially at rest start moving towards each other under mutual force of attraction. The speed of the centre of mass at any time t when they are at a distance r apart, is : |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (d) Zero</strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The centre of mass will not move, because there is no external force. There is a force of mutual attraction under which centre of mass will not shift. Hence, speed of centre of mass is zero.</span></span></p> | |
| 488. |
Zener diode is used in regulated power supply for providing (1) reference voltage (2) load (3) control of output voltage (4) control of output current |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (1) reference voltage</span></span></p> | |
| 489. |
A reaction A → B follows a second order kinetics Doubling the concentration of A will increase the rate of formation of B by a factor of : (a) 1/4 (b) 4 (c) 1/2 (d) 2 |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (b) 4 </strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Rate = k[A]<sup>2</sup> when concentration is doubled</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">r = k[(2A)<sup>2</sup></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= k 4[A]<sup>2 </sup>The new rate become 4 times</span></span></p> | |
| 490. |
P, Q, R, S are to give lecture to an audience. The organizer can arrange the order of their presentation in : (a) 256 ways (b) 24 ways (c) 4 ways (d) 12 ways |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) 24 ways</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Since there are 4 people P, Q, R, S who are to give lecture to an audience. </span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">∴ The number of ways in which their presentation can be arranged </span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">= 4 ! = 4 × 3 × 2 × 1 = 24.</span></span></p> | |
| 491. |
If a, b are odd integers, then the roots of the equation 2ax2 + (2a + b) x + b = 0, a ≠ 0 is : (a) non-real (b) equal (c) irrational (d) rational |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) rational</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Equation is 2ax<sup>2</sup> + (2a + b) x + b = 0 </span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Discriminant = (2a + b)<sup>2</sup> − 4 . 2a . b </span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= (2a + b)<sup>2</sup> − 8ab > 0 </span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">∴ Roots are rational.</span></span></p> | |
| 492. |
The three lines 3x + 4y + 6 = 0,√2x + √3y + 2 √2 = 0 and 4x + 7y + 8 = 0 are(1) the sides of a triangle(2) parallel(3) concurrent(4) none of these |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (3) concurrent </strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Solving 3x + 4y + 6 = 0 and 4x + 7y + 8 = 0,</span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">⇒ x = − 2, y = 0. These values satisfy the other equation.</span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">∴ the lines are concurrent.</span></span></p><p></p> | |
| 493. |
Read the passage and answer the questions :The emotional appeal of imperialism never completely stilled the British conscience. Homever, liberal thinkers throughout the nineteenth century argued that democracy was incompatible with the maintenance of authoritarian rule over foreign people. To think imperially was to think in terms of restrictive and protective measures; in defiance of the revealed truths of classical economics. Thus, when the British government took over responsibility for India from the East India Company in 1858, many politicians were conscious of saddling Britain with a heavy burden. In the first seventy years of the nineteenth century, enlightened British liberals looked forward to the day when India would stand on its own feet. Even in the heyday of colonialism British radicals continued to protest that self-proclaimed imperialists, however honourable their motives, would place fait accomply before the country and commit blunders of incalculable consequency.Which class of British society was a force behind the imperialist foreign policy of Britain ? (a) common class (b) middle class (c) labour class (d) aristocracy |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (d) aristocracy</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">According to the author aristocracy (self-proclaimed imperialism) was a force behind the imperalist foreign policy of Britain.</span></span></p> | |
| 494. |
Read the passage and answer the questions :The emotional appeal of imperialism never completely stilled the British conscience. Homever, liberal thinkers throughout the nineteenth century argued that democracy was incompatible with the maintenance of authoritarian rule over foreign people. To think imperially was to think in terms of restrictive and protective measures; in defiance of the revealed truths of classical economics. Thus, when the British government took over responsibility for India from the East India Company in 1858, many politicians were conscious of saddling Britain with a heavy burden. In the first seventy years of the nineteenth century, enlightened British liberals looked forward to the day when India would stand on its own feet. Even in the heyday of colonialism British radicals continued to protest that self-proclaimed imperialists, however honourable their motives, would place fait accomply before the country and commit blunders of incalculable consequency.What was the attitude of the British liberals towards the British imperialist and colonial policy ? (a) one of repeated protests (b) one of total indifference (c) one of active co-operation (d) one of only verbal co-operation |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (a) one of repeated protests</strong></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif">According to the author attitude of the British liberals towards the British imperialist and colonial policy was one of the repeated protests.</span></p> | |
| 495. |
Minimum distance between object and its real image formed by a convex lens, in terms of its focal length (f) is (1) 1.5 f (2) 2.5 f (3) 2 f (4) 4 f |
| Answer» <p></p><p class="MsoNormal"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct Option is (4) 4 f</strong></span></span></p><p class="MsoNormal"></p> | |
| 496. |
Which one is not a fertiliser? (1) NH2CONH2 (2) (NH4)2 HPO4 (3) Ca3 (PO4 )2 (4) Ca(HPO4 )2 ⋅ CaSO4 |
| Answer» <p style="text-align:justify"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (3) Ca<sub>3</sub> (PO<sub>4 </sub>)<sub>2</sub></strong></span></span></p><p style="text-align:justify"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation: </strong></span></span></p><p style="text-align:justify"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Ca<sub>3</sub> (PO<sub>4</sub> )<sub>2</sub> is insoluble in water.</span></span></p> | |
| 497. |
Which is wrong about lithium? (1) Lithium is not affected by air. (2) Lithium aluminium alloys are heavy. (3) Lithium combines with nitrogen gives Li3N. (4) Lithium chloride is hygroscopy. |
| Answer» <p><span style="color:#000000"><strong>The Correct option is (2) Lithium aluminium alloys are heavy. </strong></span></p> | |
| 498. |
Match the List I with List II and select the correct answer from the codes given below the lists:List IList IIA. OcclusionP. Removal of suspended matter from waterB. Peptisation Q. Ultrafilter paperC. DialysisR. Tyndall effectD. Coagulation S. Large volume of H2 is adsorbed by palladiumT. Ferric hydroxide is washed with water containing dilute ferric chloride |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (4) S T Q P</strong></span></p> | |
| 499. |
Match the List I with List II and select the correct answer from the codes given below the lists: List IList II A. SmokeP. EmulsionB. MilkQ. Solid solutionC. ButterR. AerosolD. Brass S. SolT. Gel |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct option is (2) R P T Q</strong></span></span></p> | |
| 500. |
The products A, B and C of the following reaction are respectively(1) C2 H5 − O − CH3, C2 H5CH2OH, CH3CHOH − CH3 (2) CH4,C2 H5COH − (CH3)2, C2 H5COOH (3) C2H6, (CH3 )2 C(OH) C2 H5, C2 H5COOH (4) CH4 ,(CH3)2 COH C2 H5, CH3COOH |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct option is <span style="text-align:justify">(3) C</span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">2</sub><span style="text-align:justify">H</span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">6</sub><span style="text-align:justify">, (CH</span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">3 </sub><span style="text-align:justify">)</span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">2</sub><span style="text-align:justify"> C(OH) C</span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">2</sub><span style="text-align:justify"> H</span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">5</sub><span style="text-align:justify">, C</span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">2</sub><span style="text-align:justify"> H</span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">5</sub><span style="text-align:justify">COOH </span></strong></span></span></p> | |