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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.
| 401. |
Complete the series with the help of given options 1/12, 2/11, 3/10,....(a) 2/9 (b) 5/7(c) 6/7(d) 4/9 |
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Answer» Correct option (d) 4/9 Explanation: In the given series the numerator of each successive number increases by one while denominator of each successive number decreases by one : Therefore, the next number will be 4/9 . |
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| 402. |
The integrated circuit (I.C.) used in counting circuits are called ________.(1) linear(2) hybrid(3) digital(4) monolithic |
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Answer» The integrated circuit (I.C.) used in counting circuits are called digital. |
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| 403. |
Complete the series. 4, 64, 5, 125, … 216 : (a) 8 (b) 6 (c) 146 (d) 256 |
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Answer» Correct option (b) 6 Explanation: As per question, IInd and 4th numbers are the cube of first and third. Therefore, last number will be cube of 6. |
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| 404. |
A is the daughter of B, C is the sister of A. B is the daughter of D. How is C related to D ? (a) Aunt (b) Daughter (c) Grand mother (d) Grand daughter |
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Answer» Correct option (d) Grand daughter Explanation: According to question, A & C are the daughters of B, while D is the mother/father of B. Therefore, C is the grand daughter of D. |
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| 405. |
Arun is the father of Rohit. Rohit is the brother of Mala. Mala is the wife of Dilip. How is Dilip related to Rohit ? (a) Uncle (b) Brother-in-law (c) Father-in-law (d) Son |
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Answer» Correct option (b) Brother-in-law Explanation: As per the question, Rohit & Mala are brother & sister while Dilip is the husband of Mala. Therefore, Dilip is the brother-in-law of Rohit. |
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| 406. |
Anand is the husband of Shama. Vibha is the sister of Anand. Sangeeta is the sister of Shama. How Sangeeta is related to Vibha ? (a) Uncle (b) Son (c) Brother-in-law(d) Sister-in-law |
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Answer» Correct option (d) Sister-in-law Explanation: According to question, Anand and Shama are the husband and wife while Vibha and Sangeeta are the sisters of Anand and Shama respectively. Therefore, Sangeeta is the sister-in-law of Vibha. |
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| 407. |
Q’s mother is the sister of R and daughter of S, N is the daughter of R and sister of M. How M is related to S ? (a) son (b) brother (c) daughter’s son (d) data inadequate |
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Answer» Correct option (d) data inadequate Explanation: From the above question, it is clear that S is the mother of R (not confirmed R is either male or female). On the other hand N is the daughter of R and sister of M (whose sex is also not known). If R is malk then M will be grand daughter/son of S in case of R is female than M will be maternal daughter/son of S. Hence, as per the options data is inadiquate. |
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| 408. |
Rajeev is the brother of Mohan. Sonia is the sister of Sudhir. Mohan is the son of Sonia. How is Rajeev related to Sudhir ? (a) Father (b) Brother (c) Son (d) Nephew |
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Answer» Correct option (d) Nephew Explanation: According to question, Sonia is the mother of Rajeev & Mohan. While Sudhir is the brother of Sonia. Therefore, Rajeev is the nephew of Sudhir. |
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| 409. |
A fair coin is tossed repeatedly. If tail appears on first four tosses, then the probability of head appearing on fifth toss equals(1) 1/2 (2) 1/32 (3) 31/32 (4) 1/5 |
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Answer» Correct Option (1) 1/2 Explanation: Each toss is independent of the earlier tosses and hence the probability of head appearance in the fifth toss = 1/2. |
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| 410. |
ICs are generally from______. (1) germanium (2) silicon (3) carbon (4) none of these |
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Answer» ICs are generally from silicon. |
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| 411. |
The order of magnitude of the density of nuclear matter is : (a) 1034 kg ⁄ m3 (b) 104 kg ⁄ m3 (c) 1017 kg ⁄ m3 (d) 10−15 kg ⁄ m3 |
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Answer» Correct option (c) 1017 kg ⁄ m3 Explanation: The magnitude of the density of nuclear matter is of the order of 1017 kg ⁄ m3. |
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| 412. |
Heavy water is used as moderator in a nuclear reactor. The function of the moderator is : (a) to cool the reactor (b) to slow down the neutrons (c) to absorb neutrons and stop chain reaction (d) to control the energy released in the reactor |
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Answer» Correct option (b) to slow down the neutrons Explanation: Heavy water is used as moderator in nuclear reactor to slow down the neutrons. |
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| 413. |
Characteristic X - rays are due to (1) emission of inner orbit electrons (2) re - emission of absorbed X - rays (3) absorption of energy (4) excitation of outer orbit electrons |
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Answer» The Correct Option is (2) re - emission of absorbed X - rays |
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| 414. |
Dimension of nucleus is of the order of 1 Fermi. With what velocity should electrons move so that it is found inside the nucleus? (1) 7 × 1011 m/s (2) 3 × 108 m/s (3) 6 × 108 m/s (4) 1.5 × 108 m/s |
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Answer» The Correct Option is (1) 7 × 1011 m/s |
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| 415. |
In any nuclear reaction, energy is released or absorbed and accordingly the Q-value which is our index for the change in the energy is positive or negative. Study the statements given below and identify the correct one(s). i. In the exoergic reaction Q is positive Energy is released ii. In the exoergic reaction Q is negative Energy is absorbed iii. In the endoergic reaction Q is negative Energy is absorbed iv. In the endoergic reaction Q is positive Energy is released (1) i and iii (2) i and iv (3) ii and iv (4) i only |
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Answer» The Correct Option is (1) i and iii |
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| 416. |
In a steady incompressible flow of a liquid(1) the speed does not change if the area of cross-section changes(2) the speed increases if the area of cross-section increases(3) the speed decreases if the area of cross-section increases(4) bubbles are produced when the area of the cross-section increase |
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Answer» The Correct Option is (3) the speed decreases if the area of cross-section increases |
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| 417. |
Five digit numbers are formed with 0, 1, 3, 5, 7. The number of numbers in which at least one digit is repeated is (1) 96 (2) 2400 (3) 2500 (4) 2404 |
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Answer» Correct option (4) 2404 Explanation: The number of all five digit numbers that can be formed with 0, 1, 3, 5,7 = 4.54 (∴ 0 cannot occur in the 10000th place) = 2500 The number of numbers without any repetition = 4 × 4 × 3 × 2 × 1 = 96 ∴ the number of five digit numbers with at least one digit repeated = 2500 − 96 = 2404 |
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| 418. |
A force is a : (a) localised vector (b) free vector (c) zero vector (d) unit vector |
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Answer» A force is a Localised vector. |
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| 419. |
In froth floatation process many chemicals (frother, collector, activator and depressant) are used. Which is called a frother ? (a) Pine oil (b) CuSO4 (c) Potassium xanthate (d) NaCN + alkali |
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Answer» Correct option (a) Pine oil Explanation: Froth is a colloidal system of a gas in liquid. It has very good adsorption capacity, frothers generate a stable froth which rises to the top of the tank. The best example of frother is pine oil. |
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| 420. |
Which one of the following pairs of solution can we expect to be isotonic at the same temperature ? (a) 0.1 M urea and 0.1 M NaCl (b) 0.1 M urea and 0.2 M MgCl2 (c) 0.1 M NaCl and 0.1 M Na2SO4 (d) 0.1 M Ca(NO3)2 and 0.1 M Na2SO4 |
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Answer» Correct option (d) 0.1 M Ca(NO3)2 and 0.1 M Na2SO4 Explanation: ‘i’ for Ca(NO3)2 and Na2SO4 is 3 each. Their colligative molarity are also the same. Hence, 0.1 M Ca(NO3)2 and 0.1 M Na2SO4 solutions are isotonic. |
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| 421. |
At room temperature, the forbidden energy gap of germanium crystal is about : (a) 0.072 eV (b) 0.75 eV (c) 0.105 eV (d) 1.05 eV |
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Answer» Correct option (b) 0.75 eV Explanation: The forbidden energy gap of germanium crystal is about 0.75 eV at room tempearature. |
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| 422. |
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) USURP (1) to be lazy (2) to climb (3) to seize power or position illegally (4) to yield(b) MERCURIAL (1) mechanical (2) heavy (3) clownish (4) quick-changing(c)ALLEVIATE (1) to release (2) to lessen (3) to deprive (4) to deceive(d)EXTENUATE (1) to lessen in degree (2) to express (3) suggest (4) object(e)RECTITUDE (1) refuse (2) integrity (3) reaching out (4) revenge |
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Answer» (a)(3) to seize power or position illegally (b)(4) quick-changing (c)(2) to lessen (d)(1) to lessen in degree (e)(2) integrity |
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| 423. |
Choose the correct word to complete the sentences from the given choice :Neither of the boys could express .......... ideas : (a) these (b) there (c) his (d) him |
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Answer» Correct option (c) his Explanation: ‘His’ is a singular possessive adjectives, used with neither |
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| 424. |
Direction: 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 that part which has an error and mark accordingly.(1) The carpet was badly stained (2) to such an extent (3) that you could n't tell (4) its original colour |
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Answer» Correct option (1) The carpet was badly stained Explanation: 'The carpet was stained' in place of 'The carpet was badly stained'. |
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| 425. |
Direction: 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. (a) Though badly wounded he clung to his life with firm determination. (1) tendency (2) tenacity (3) sustenance (4) absteation(b) He started the fight without being incited by anger. (1) abjected (2) improvised (3) provoked (4) poverished |
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Answer» (a)(2) tenacity (b)(3) provoked |
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| 426. |
Colloidal solutions are not purified by : (a) ultrafilteration (b) electrophoresis (c) electrodialysis (d) dialysis |
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Answer» Correct option (b) electrophoresis Explanation: The migration of colloidal particles under the influence of electric field towards an electrode is known as electrophoresis so electrophoresis is a characteristic of colloidal particles. |
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| 427. |
Central metal ions in a complex acts as : (a) Lewis base (b) Bronsted acid (c) Lewis acid (d) Arrhenius acid |
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Answer» Correct option (c) Lewis acid Explanation: Metal cation possesses the tendency to accept electron pair from ligands so the central metal ion in complex acts as Lewis acid. |
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| 428. |
The point (4, − 3) with respect to the ellipse 4x2 + 5y 2 = 1 (1) lies on the curve (2) lies outside the curve (3) lies inside the curve (4) is the focus |
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Answer» Correct option (2) lies outside the curve Explanation: E ≡ f(x, y) ≡ 4x2 + 5y 2 − 1 f(4, − 3) = 108 is positive. ∴ (4, − 3) lies outside the ellipse. |
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| 429. |
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. Several other gases, such as argon, carbon dioxide, hydrogen, neon, krypton and xenon, comprise the remaining 1% of the volume of dry air. B. Atmospheric gases hold in suspension great quantities of dust, pollen, smoke and other impurities which are always present in considerable, but variable amounts. C. The amount of water vapour and its variations in amount and distribution are of extraordinary importance in weather changes. D. The atmosphere is a mixture of several gases. E. Of these permanent gases, oxygen makes up about 21% and nitrogen about 78%. F. There are about ten chemical elements which remain permanently in gaseous form in the atmosphere under all natural conditions. (1) EFBCAD (2) DFEACB (3) DEAFBC (4) DBCEAF |
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Answer» The Correct option is (2) DFEACB |
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| 430. |
Match List I with List II and select the correct answer from the codes given below the lists:List IList II (a) VLF communication(p) Stratosphere scattering(b) HF communication(q) Reflection in ionosphere(c) Microwave communication(r) Ground wave(d) mm wave comunication(s) Line of sight propagationCodes (1) (a − p) (b − q) (c − r) (d − s) (2) (a − s) (b − p) (c − r) (d − p) (3) (a − r) (b − q) (c − s) (d − p) (4) (a − q) (b − s) (c − r) (d − p) |
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Answer» The Correct option is (3) (a − r) (b − q) (c − s) (d − p) |
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| 431. |
Bandwidth of colour television transmission channel in India is of(1) 100 kHz(2) 1 MHz(3) 7 MHz(4) 10 MHz |
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Answer» The Correct option is (3) 7 MHz |
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| 432. |
Given two statements: A: When an impurity is added to a pure metal, the residual resistivity at zero K is not zero. R: At absolute zero temperature, lattice vibration ceases to exist. (1) Both A and R are true, and R is the correct explanation of A. (2) Both A and R are true, but R is NOT the correct explanation of A. (3) A is true, but R is false. (4) A is false but R is true. |
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Answer» The Correct Option is (1) Both A and R are true, and R is the correct explanation of A. |
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| 433. |
Given two statements: A: Optical fibres have broader bandwidth compared to conventional copper cables. R: The information carrying capacity of optical fibres is limited by Rayleigh scattering loss. (1) Both A and R are true, and R is the correct explanation of A. (2) Both A and R are true, but R is NOT the correct explanation of A. (3) A is true, but R is false. (4) A is false but R is true. |
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Answer» The Correct option is (2) Both A and R are true, but R is NOT the correct explanation of A. |
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| 434. |
An oil immersion objective used in a microscope is based on which of the following functions? (i) Use of the aplanatic points of a single surface to eliminate spherical aberration (ii) Use of thicker medium of the same refractive index to increase magnification (iii) Use of a second lens to enhance the magnification (iv) Use of special wood oil to eliminate chromatic aberration (1) (i) and (iv) (2) (ii) and (iv) (3) (ii) and (iii) (4) (i), (ii) and (iii) |
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Answer» The Correct option is (4) (i), (ii) and (iii) |
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| 435. |
A: Superconducting materials are not good conductors at room temperature asthe normal metals are at room temperature. R: Superconductivity is observable only if the applied magnetic field is below the critical field. (1) Both A and R are true, and R is the correct explanation of A. (2) Both A and R are true, but R is NOT the correct explanation of A. (3) A is true, but R is false. (4) A is false but R is true. |
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Answer» The Correct option is (1) Both A and R are true, and R is the correct explanation of A. |
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| 436. |
In a parallel resonance circuit formed of L and C, resonance is to be obtained with an oscillator giving an output frequency of ω rad/sec. To obtain resonance, and unity power factor (1) either one, L, C or ω can be varied (2) it is better to vary L rather than C or ω (3) it is better to vary C or ω rather than L (4) it is best to vary C |
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Answer» The Correct option is (4) it is best to vary C |
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| 437. |
With what aspects of radiation is the equantion log λ = log R + B associated? (1) characteristic X-rays (2) black body radiation (3) α-emission (4) Compton effect |
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Answer» The Correct option is (3) α-emission |
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| 438. |
When a concave lens made of glass is immersed in water it becomes(1) less convergent(2) more convergent(3) less divergent(4) more divergent |
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Answer» The Correct option is (3) less divergent |
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| 439. |
End of glass tube becomes round on heating due to (1) surface tension (2) viscosity (3) gravity (4) friction |
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Answer» End of glass tube becomes round on heating due to surface tension. |
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| 440. |
The earth revolves round the sun in an elliptical orbit with sun at one of the foci as shown in Figure. The orbital speed of the earth is maximum near the point(1) C (2) D (3) A (4) B |
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Answer» The Correct option is (3) A |
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| 441. |
Which of the following statements is wrong? (1) The molecular formula of tetramethyl silane is (CH3)4 SiH4 . (2) SiCl4 undergoes hydrolysis due to the presence of empty d-orbitals in Si. (3) Fluorosilicic acid (H2 SiF6 ) is a strong acid, exist only in solution. (4) The octahedral SiF-26 ion is the only halogen complex of silicon which involves sp3d2 hybridisation. |
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Answer» The Correct option is (3) Fluorosilicic acid (H2 SiF6) is a strong acid, exist only in solution. |
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| 442. |
A greenish yellow poisonous gas reacts with alkali metal hydroxide to form a halate [xO-3] which is used in firework and safety matches. The gas and the halate respectively are (1) Br2 and KBrO3 (2) Cl2 and KClO3 (3) I2 and KIO3 (4) Cl2 and KClO4 |
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Answer» The Correct option is (2) Cl2 and KClO3 |
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| 443. |
The metallic sulphide with highest solubility product value (Ksp ) in water at 278 K is (1) PbS (2) CuS (3) Ag2S (4) ZnS |
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Answer» The Correct option is (4) ZnS |
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| 444. |
Compounds formed when soluble gases get entrapped in the cavities of crystal lattice of certain organic and inorganic compounds are called (1) interstitial compounds (2) clathrates (3) hydrates (4) picrates |
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Answer» Correct option (2) clathrates Explanation: Chemical compounds formed, not by the action of valence bonds, but by molecular imprisonment, the combined molecules being held together mechanically by virtue of the vacant space in between them are called as clathrates. |
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| 445. |
Two equal resistances each of 100 Ω ± 1% (standard deviation) are connected in parallel. The standard deviation of the parallel combination will be(1) 0.5% (2) 1/√2% (3) √2% (4) 2% |
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Answer» The Correct option is (2) 1/√2% |
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| 446. |
The length of the string of a simple pendulum is measured with a meter scale to be 92.0 cm, the radius of the bob plus the hook is measured with the help of vernier caliper to be 2.17 cm. Mark out the correct statement(s) (1) Least count of meter scale is 0.1 cm (2) Least count of vernier caliper is 0.01 cm (3) Effective length of simple pendulum is 94.2 cm (4) All the above |
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Answer» The Correct option is (4) All the above |
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| 447. |
When the object is at a distance u1 and u2 from the optic centre of a lens, a real and a virtual image is formed respectively with the same magnification. The focal length of the lens is |
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Answer» The Correct option is (1) |
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| 448. |
A ball falls freely from a height and after striking the ground, rebounds to its starting point. Which of the following graphs (fig) shows the variation in its vertical acceleration a with time t : |
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Answer» Correct option (d) Explanation: When the ball falls freely on the ground and rebounds its starting point, the acceleration is instantaneously changed but the magnitude remains the same. |
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| 449. |
Iron and silicon wires are heated from 30°C to 50°C. The correct statement is that :(a) resistance of iron wire decreases(b) resistance of iron wire increases and that of silicon wire decreases(c) resistance of iron wire decreases and that of silicon wire increases(d) resistance of both wires increases |
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Answer» Correct option (b) resistance of iron wire increases and that of silicon wire decreases Explanation: Iron is a metal and silicon is a semiconductor. The resistivity of metal is directly proportional to its absolute temperature but the resistivity of semiconductor is inversely proportional to its absolute temperature. Hence, resistivity of metallic wire like iron increases and resistivity of silicon wire decreases with the increase of temperature. |
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| 450. |
Copper can be extracted from : (a) kupfer nickel (b) dolomite (c) malachite (d) galena |
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Answer» Correct option (c) malachite Explanation: Malachite is an ore of copper, so copper can be extracted from malachite. |
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