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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your 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 |
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Answer» Correct option (a) both ΔH and ΔS are +ve Explanation: Sublimation requires energy i.e., ΔH = +ve |
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| 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 |
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Answer» The Correct option is (2) B, D |
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| 453. |
Efficiency of a HW rectifier is nearly (1) 80% (2) 60% (3) 40% (4) 20% |
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Answer» The Correct option is (3) 40% |
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| 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. |
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Answer» The Correct option is (3) SN2 reaction takes place through carbocation formation. |
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| 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 |
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Answer» Correct option (1) 169194 Explanation: (a) Total number of permutations = 9!/2 ,since N is repeated. (b) Number of permutations in which 'HIN' comes as a block = 7! Number of permutations in which 'TAN' comes as a block = 7! Number of permutations in which 'DUS' comes as a block = 7!/2 (c) This includes both 'HIN' and 'TAN' comes as blocks = 5! same is true for the other two pairs. (d) Number of permutations in which all three blocks come = 3! ∴ required number of permutations |
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| 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 |
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Answer» Correct option(3) 82 Explanation: The graph of the function x2 − 4x + log3 a does not cut the real axis. ⇒ the roots of x2 − 4x + log3 a = 0 are imaginary. ⇒ log3 a > 4 ⇒ a > 81 ⇒ the least integral value of a is 82. |
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| 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) |
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Answer» Correct option (d) P (n − p, r) Explanation: 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 n − p Pr = P (n − p, r), where P (r ≤ n − p) |
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| 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 |
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Answer» The Correct option is (2) Tetraaquadibromochromium(III) bromide dihydrate |
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| 459. |
Thermal radiations are electromagnetic waves belonging to : (a) ultraviolet region (b) visible region (c) gamma region (d) infra-red region |
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Answer» Correct option (d) infra-red region Explanation: 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. |
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| 460. |
The unit of Poynting vector is (1) watt (2) watt m3 (3) watt/m2 (4) watt/m3 |
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Answer» The Correct option is (3) watt/m2 |
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| 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 |
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Answer» Correct option (a) 1800 coulomb Explanation: The total charge passing through bulb is q = it ...(1) Here, i = 0.5 A, t = 1 hour t = 1 × 60 × 60 sec t = 3600 sec from eq. (i) = 0.5 × 3600 = 1800 coulomb |
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| 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 ! |
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Answer» Correct option n ! /(n -m) ! Explanation: Let A = {a1, a2, … am},B = {b1, b2, …, bn}, and let f : A → B. The possible choices for f (a1) are n. Having fixed f (a1), the possible choices for f (a2) are n − 1, and so on. Thus, there are n (n − 1) (n − 2) … (n − (m − 1)) = n !/(n -m) ! injective mappings from A to B. |
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| 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 |
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Answer» The Correct option is (1) EFDCBA |
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| 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 |
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Answer» Correct option (c) beautiful Explanation: Sorrow’s synonyms are misery, unhappiness and sadness while ‘beautiful’ has different meaning. |
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| 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 |
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Answer» (a)(2) guess (b)(1) kill (c)(2) lukewarm |
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| 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 |
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Answer» The Correct option is (2) expedited |
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| 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 |
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Answer» The Correct option is (a)(3) invigorating (b)(1) interesting (c)(2) quench |
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| 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 |
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Answer» The Correct Option is (2) Silicon dioxide |
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| 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 : |
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Answer» Correct option (d) (m + 1)n − 1 Explanation: In the case of each book we may take 0, 1, 2, 3, ... m copies. ∴ 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 = (m + 1)n − 1 |
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| 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 |
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Answer» Correct option (c) –94.0 kcals Explanation: Given C + O2 → CO2 ΔH = −94.0 kcals The equation represents heat of combustion of carbon as well as heat of formation of CO2. |
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| 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 |
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Answer» Correct Option (2) 1 Explanation: x2 + y2 = 22 and (x − 3)2 + (y − 4)2 = 72 touch internally, d = r1 − r 2 = 5 Number of common tangents = 1 |
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| 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 |
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Answer» (a)(3) Counsellor : Counselling (b)(3) Ground : Play (c)(4) Marble : Sculptor (d)(3) Dirty : Filthy |
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| 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 |
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Answer» Correct option (b) latter Explanation: ‘Former’ means first of the two things but ‘latter’ means second of the two things. |
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| 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 |
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Answer» Correct option (a) borrow Explanation: ‘Lend’ to grant but ‘borrow’ means to take. |
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| 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 |
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Answer» The Correct option is (a)(3) can able to (b)(4) finished their task (c)(4) moved round the Sun |
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| 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 |
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Answer» The Correct option is (2) SRQP |
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| 477. |
Radio - isotopes are not used to(1) study plant metabolism(2) diagnose diseases(3) track the energetic radiation(4) non-destructive testing |
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Answer» The Correct Option is (3) track the energetic radiation |
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| 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 |
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Answer» The Correct option is (3) 1.41 cm |
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| 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 |
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Answer» The Correct option is (3) 2H+ , He++ , P, E |
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| 480. |
The positron has a charge equal to that of : (a) a proton (b) an α-particle (c) a neutron (d) an electron |
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Answer» Correct option (a) a proton Explanation: Positron is anti-electron. It possesses the same magnitude of charge as proton. |
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| 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 |
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Answer» The Correct option is (2) H2O2 |
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| 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 |
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Answer» The intensity of cosmic ray is minimum at the equator. This is due to magnetic field of the earth. |
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| 483. |
The wave number equals to the number of waves (1) per kg (2) per second (3) per metre (4) crossing per unit area |
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Answer» The Correct Option is (3) per metre |
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| 484. |
In an oscillator, the feedback can be done by a (1) transistor (2) rectifier (3) step - up transformer (4) step - down transformer |
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Answer» The Correct Option is (4) step - down transformer |
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| 485. |
Adiabatic demagnetization of a substance (1) decrease the temperature (2) increase the temperature (3) increase the volume (4) decrease the volume |
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Answer» The Correct option is (1) decrease the temperature |
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| 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 |
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Answer» The Correct option is (4) imω2 r |
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| 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 : |
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Answer» Correct option (d) Zero Explanation: 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. |
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| 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 |
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Answer» The Correct option is (1) reference voltage |
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| 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 |
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Answer» Correct option (b) 4 Explanation: Rate = k[A]2 when concentration is doubled r = k[(2A)2 = k 4[A]2 The new rate become 4 times |
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| 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 |
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Answer» Correct option (b) 24 ways Explanation: Since there are 4 people P, Q, R, S who are to give lecture to an audience. ∴ The number of ways in which their presentation can be arranged = 4 ! = 4 × 3 × 2 × 1 = 24. |
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| 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 |
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Answer» Correct option (d) rational Explanation: Equation is 2ax2 + (2a + b) x + b = 0 Discriminant = (2a + b)2 − 4 . 2a . b = (2a + b)2 − 8ab > 0 ∴ Roots are rational. |
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| 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 |
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Answer» Correct option (3) concurrent Explanation: Solving 3x + 4y + 6 = 0 and 4x + 7y + 8 = 0, ⇒ x = − 2, y = 0. These values satisfy the other equation. ∴ the lines are concurrent. |
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| 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 |
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Answer» Correct option (d) aristocracy Explanation: According to the author aristocracy (self-proclaimed imperialism) was a force behind the imperalist foreign policy of Britain. |
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| 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 |
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Answer» Correct option (a) one of repeated protests Explanation: According to the author attitude of the British liberals towards the British imperialist and colonial policy was one of the repeated protests. |
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| 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 |
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Answer» The Correct Option is (4) 4 f |
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| 496. |
Which one is not a fertiliser? (1) NH2CONH2 (2) (NH4)2 HPO4 (3) Ca3 (PO4 )2 (4) Ca(HPO4 )2 ⋅ CaSO4 |
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Answer» Correct option (3) Ca3 (PO4 )2 Explanation: Ca3 (PO4 )2 is insoluble in water. |
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| 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. |
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Answer» The Correct option is (2) Lithium aluminium alloys are heavy. |
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| 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 |
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Answer» The Correct option is (4) S T Q P |
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| 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 |
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Answer» The Correct option is (2) R P T Q |
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| 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 |
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Answer» The Correct option is (3) C2H6, (CH3 )2 C(OH) C2 H5, C2 H5COOH |
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