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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.
| 51. |
Read the following passage carefully and answer the questions given below in the passage. Certain words/phrases in the passage are given in bold to locate them while answering some of the questions. The world of today has achieved much, but for all its declared love for hymanity it has based itself for more on hatred and violence than on the virtues that make man human. War is the negation of truth and humanity. Sometimes, war may be unavoidable but its progeny are terrible to contemplate. Not mere killing, for man must die, but the deliberate and persistent propagation of harted and falsehood, which gradually become the normal habits of the people. It is dangerous and harmful to be guided in our life’s course by hatreds and aversions, for they are wasteful of energy and limit and twist the mind, and prevent if from perceiving the truth.War is the negation of truth means : (a) wars are evil (b) wars do not exist (c) war kills human beings (d) wars spread and advertisae falsehood |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial">Correct option (d) wars spread and advertisae falsehood</span></strong></span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial">Explanation:</span></strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">According to the passage the meaning of the sentence—war is the negation of truth is that wars always spread and give rise to falsehood.</span></span></p> | |
| 52. |
Plaster of Paris is : (a) CaSO4⋅H2O (b) 2CaSO4⋅2H2O (c) CaSO4⋅2H2O (d) CaSO4⋅1 ⁄ 2H2O |
| Answer» <p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) CaSO<sub>4</sub>⋅1 ⁄ 2H<sub>2</sub>O</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">CaSO<sub>4</sub>.1/2H<sub>2</sub>O is known as plaster of Paris.</span></span></p> | |
| 53. |
Composition of Kopper’s gas is : (a) CO (14−16%) + H2 (35−42%) + CO2 (30%) + CH4 (10−15%) (b) CO (51⋅1%) + CO2 (12⋅6%) + H2 (34%) + N2 (1⋅9%) + O2 (0⋅1%) + CH4 (c) CO (46%) + H2(36.6%) + CO2 (14%) + N2 (1.1%) + CH4(2.4%) (d) none of the above |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>Correct option (c) CO (46%) + H<sub>2</sub>(36.6%) + CO<sub>2</sub> (14%) + N<sub>2</sub> (1.1%) + CH<sub>4</sub>(2.4%)</strong></span></p><p style="text-align: justify;"><span style="color:#000000"><strong>Explanation:</strong></span></p><p style="text-align: justify;"><span style="color:#000000">CO(46%) + H<sub>2</sub>(36%) + CO<sub>2</sub>(14%) + N<sub>2</sub>(1.1%) + CH<sub>4</sub>(2.9%) is Kopper’s gas.</span></p> | |
| 54. |
1 mole of CH4 contains : (a) 3.0 g of carbon (b) 1.81 × 1023 molecules of CH4 (c) 4 g atoms of hydrogen (d) 6.02 × 1023 atoms of H |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (c) 4 g atoms of hydrogen</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">1 mole of CH<sub>4</sub> contains 1 mole of carbon and 4g atoms (mole) of hydrogen.</span></span></p> | |
| 55. |
Directions: 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)HORSE : COLT :: (1) goat : bleat (2) dawn : twilight(3) dog : puppy (4) actor : stage(b)FROGS : CROAK :: (1) hare : leveret (2) liquor : intoxication (3) serpents : hiss (4) brake : car |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>The Correct option is</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(a)(3) dog : puppy</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(b)(3) serpents : hiss</strong></span></span></p> | |
| 56. |
Find the odd man out.(a) Kid (b) Lamb (c) Kitten (d) Horse |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (d) Horse</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">It is known that Kid, Lamb and Kitten represents young ones while horse is not a young ones, it is adult ones. Therefore, horse is the odd man.</span></span></p> | |
| 57. |
The best absorbent for CO2 is : (a) NaOH (b) NaO (c) H2SO4 (d) water |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) NaOH</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">CO<sub>2</sub> is best absorbed by NaOH. CO<sub>2 </sub>is absorbed by alkali to give salts.</span></span></p>A carbon dioxide scrubber is a device which absorbs carbon dioxide (CO2). It is used to treat exhaust gases from industrial plants or from exhaled air in life support systems such as rebreathers or in spacecraft, submersible craft or airtight chambers. Carbon dioxide scrubbers are also used in controlled atmosphere (CA) storage. They have also been researched for carbon capture.<br><br>NaOH can be used to absorb carbon dioxide. NaOH reacts with CO2 and produces sodium carbonate (salt) and water and helps to reduce bad effects of carbon dioxide<br><br>CO2 + NaOH → Na2CO3 + H2O | |
| 58. |
Which metal loses its meniscus after reaction with ozone ? (a) Cu (b) Pb (c) Ag (d) Hg |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) Hg</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">Hg reacts with O<sub>3</sub> to form HgO which sticks on walls.</span></span></p> | |
| 59. |
Ammonium molybdate is used for the detection of : (a) PO4 3− (b) Cd2+ (c) Bi3+ (d) Cu3+ |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (a) PO<sub>4</sub><sup>3-</sup></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">Ammonium molybdate is used for the detection of PO<sub>4</sub><sup>3− </sup> and As<sup>3+ </sup>.</span></span></p> | |
| 60. |
Match List I with List II and select the correct answer from the codes given below the Lists:List IList IIA. Bordeaux mixtureP. AgNO3(aq) with excess of NH4OHB. Schweitzers reagentQ . CuSO4(aq) + NaOH and sodiumpotassium tartarateC. Tollen's reagentR. CuSO4(aq) excess of NH4OHD. Fehlings reagentS. FeSO4 and H2 O2T. CuSO4(s) + Ca(OH)2(s) |
| Answer» <p><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct option is (4) T R P Q</strong></span></span></p> | |
| 61. |
The volume strength of 1.5 N H2O2 solution is (1) 3.0 (2) 4.8 (3) 8.4 (4) 12 |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong><span style="font-size:18.6667px">Correct option </span>(3) 8.4</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:18.6667px">Explanation</span></strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Volume strength = 5.6 × Normality </span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">= 5.6 × 1.5</span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">= 8.4.</span></span></p> | |
| 62. |
Which one of the following theories explains the magnetic nature, formation of spin free complexes etc? (1) Valence bond theory (2) Molecular orbital theory (3) Effective atomic number theory and magnetic property (4) Crystal field theory |
| Answer» <p><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><span style="font-size:16px"><strong>The Correct option is (4) Crystal field theory</strong></span></span></span></p> | |
| 63. |
The product Y is (1) lactic acid (2) ethylamine (3) propylamine (4) alanine |
| Answer» <p><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong><span style="font-size:11pt; line-height:115%">The Correct option is (4) alanine</span></strong></span></span></p> | |
| 64. |
Among the properties A. reducing B. oxidising C. complexing,the set of properties shown by CN− ion towards metal species is (1) A, B (2) B, C (3) A, C (4) A, B, C |
| Answer» <p><span style="color:#000000"><strong>The Correct option is (3) A, C</strong></span></p> | |
| 65. |
Choose the incorrect statement among the following. (1) Synthetic materials like nylon, terrylene are not eaten by white ants; moths etc. (2) Synthetic dyes are non-poisonous and non-hazardous. (3) Only high calorific low density fuels are used in rockets. (4) Enzyme reactions are specific, take place at 30°C at specific pH. |
| Answer» <p><span style="color:#000000"><strong>The Correct option is (2) Synthetic dyes are non-poisonous and non-hazardous.</strong></span></p> | |
| 66. |
The photoelectric effect does not depend on(1) the frequency of incident light(2) the intensity of accident light(3) anode material(4) applied voltage |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The photoelectric effect does not depend on<strong> anode material.</strong></span></span></p> | |
| 67. |
A new C - C bond formation is possible in (1) Cannizzaro’s reaction (2) Halform reaction (3) Clemmensen reduction (4) Reimer-Tiemann’s reaction |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-size:16px"><strong><span style="font-family:Calibri,sans-serif; line-height:115%">The Correct option is (4) Reimer-Tiemann’s reaction</span></strong></span></span></p> | |
| 68. |
Identify the wrong statement. (1) Among the constituents of air, O2, H2O, CO2, ozone, nitrogen will not produce green house effect(2) Hg0, Hg +2, Cu 0, Cu +2, Cd + are poisonous to living system. (3) Flexible rubber is hardened by cross polymerisation with ZnO. (4) TiCl4 with (C2 H5 )3 Al is the Ziegler-Natta catalyst used in the polymerisation of olefin. |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct option is (3) Flexible rubber is hardened by cross polymerisation with ZnO.</strong></span></span></p> | |
| 69. |
The correct statement among the following is (1) As +5 is an oxidising agent. (2) Pb +4 is reducing agent. (3) Tl +3 is oxidising agent. (4) H2 SO4 and HNO3 are reducing agents. |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (2) Pb <sup>+4 </sup>is reducing agent</strong></span></p> | |
| 70. |
The maximum bond angle in hydrides of group 16-elements is in : (a) H2Te (b) H2Se (c) H2S (d) H2O |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) H<sub>2</sub>O</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">As we move down the group, the bond angle decrease due to decrease in bond pair-bond pair repulsion. </span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"> H<sub>2</sub>O H<sub>2</sub>S H<sub>2</sub>Se H<sub>2</sub>Te </span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Bond angle 104.5° 92.2° 91° 90°</span></span></p><p></p> | |
| 71. |
The set of elements showing inert pair effect is (1) Na, Mg, N, P (2) F, Cl, Br, I (3) Tl, Pb, Bi (4) Pb, Ba, Al, I |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (1) Na, Mg, N, P</strong></span></p> | |
| 72. |
Which of the following combination of atomic orbitals is correct? |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct Option(4)</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">Atomic orbitals of same sign combines to form molecular orbital.</span></span></p> | |
| 73. |
The higher bond energy among the following is(1) C − O(2) C − F(3) O − F(4) N − F |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct Option (2) C − F</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">Greater the electronegativity difference between the atoms in the bond, greater will be the bond energy (C − F bond energy is high). </span></span></p> | |
| 74. |
Correct order of hydration energy is (1) Li + < Na + < K + < Rb + (2) Li + < K + < Na + < Rb + (3) Rb + < K + < Na + < Li + (4) Rb + < Na + < K + < Li + |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (3) Rb<sup> +</sup> < K<sup> +</sup> < Na <sup>+</sup> < Li<sup> +</sup></strong></span></p> | |
| 75. |
Which of the following statement is correct? (1) A molecule with polar bonds will always have same dipole moment. (2) A molecule having polar bond may have zero dipole moment. (3) A molecule can have dipole moment even if it has no polar covalent bond. (4) The percentage of ionic character of LiF is 100%. |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (2) A molecule having polar bond may have zero dipole moment. </strong></span></p> | |
| 76. |
The electronegativity of the following elements increases in the order (1) S < P < N < O (2) P < S < N < O (3) N < O < P < S (4) N < P < S < O |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong>The Correct Option is (2) P < S < N < O</strong></span></p><p class="MsoNormal"></p><p></p> | |
| 77. |
The type of bonds present in copper sulphate crystals are (1) ionic bonds (2) covalent bonds (3) coordinate bonds (4) ionic, covalent, coordinate and hydrogen bonds |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (4) ionic, covalent, coordinate and hydrogen bonds</strong></span></p> | |
| 78. |
An electrolyte dissolves in a solvent when (1) its lattice energy is greater than solvation energy (2) its ionic product exceeds solubility product (3) the vapour pressure of the solution is equal to the atmospheric pressure (4) solvation energy is greater than the lattice energy |
| Answer» <p style="text-align:justify"><span style="color:#000000"><strong>The Correct option is (4) solvation energy is greater than the lattice energy</strong></span></p> | |
| 79. |
The energy gap between conduction and valence bands of silicon is : (a) 2 eV (b) 1.7 eV (c) 1.1 eV (d) 1 eV |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>Correct option (c) 1.1 eV </strong></span></p><p style="text-align: justify;"><span style="color:#000000"><strong>Explanation:</strong></span></p><p style="text-align: justify;"><span style="color:#000000">Conduction band and valence band of silicon are separated by energy gap of 1.1 eV.</span></p> | |
| 80. |
Diode is used as a/an : (a) modulator (b) oscillator (c) amplifier (d) rectifier |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) rectifier</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">When plate of diode is connected to A.C. source, then during positive half cycle when plate is at positive potential, current will flow through diode and during negative half cycle, current will not flow through it. Thus diode can be used as a rectifier.</span></span></p> | |
| 81. |
In Arrhenius equation, k = Ae-Ea/RT, the factor e-Ea ⁄RT is known as(1) frequency factor (2) activation factor (3) pre-exponential factor (4) Boltzmann factor |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (4) Boltzmann factor</span></span></p><p></p> | |
| 82. |
Which of the following statement/s is/are correct? (1) Faraday is defined as the charge carried by 1 mole of electron. (2) IF = 6.023 × 10 23 × 1.602 × 10 −19 C (3) Faraday is the quantity of electricity required to decompose or to liberate 1 gram equivalent of a substance. (4) All statements are correct. |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (4) All statements are correct.</span></span></p> | |
| 83. |
Select the pair of words, which are related in the same way as the capitalised words are related to each other.ARGUMENT : DISAGREEMENT : : ? (a) ignore : judgment (b) mitigate : repent (c) punish : criminal (d) thought : thinking |
| 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 (d) thought : thinking</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">As argument and disagreement are the synonym. In the same way thought and thinking are also synonyms.</span></span></p> | |
| 84. |
Select the pair of words, which are related in the same way as the capitalised words are related to each other.KICK : FOOTBALL : : ? (a) smoke : cigar (b) boat : fisherman (c) wine : bottle (d) table : chair |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) smoke : cigar</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 football is kicked by player same as cigar is smoked by smoker. </span></span></p> | |
| 85. |
Out of the following spectral series of hydrogen spectrum, the one which lies wholly in the ultraviolet region, is : (a) Paschen series (b) Lyman series (c) Balmer series (d) Brackett series |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) Lyman series</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">We know that Lyman series lies ultraviolet region which have wavelength between 1215Å to 912Å. Balmer series lies in visible region. Other series lie in infrared-region.</span></span></p> | |
| 86. |
The number of rational numbers of the form p/q , where p, q ∈ {3, 4, 8, 9, 12} is(1) 25(2) 21(3) 19(4) 23 |
| 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 (3) 19</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">There are 5 numbers of the form P/q with 3 in the numerator. Similarly for each of 4, 8, 9 and 12.</span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">∴ total number of numbers of the form p q is 5 × 5 = 25. </span></span></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">But the value 1 is repeated 5 times, 1/3 is repeated twice and 3/4 is repeated twice.</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">∴ the number of distinct rational numbers formed</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= 25 − 4 − 1 − 1 = 19.</span></span></p> | |
| 87. |
In which of the following molecules, octet rule is not obeyed ? (a) PCl3 (b) ClF3 (c) ICl (d) CO2 |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (b) ClF<sub>3</sub></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">Geometry of ClF<sub>3</sub> molecule is T-shaped. There are ten electrons (three bond pairs and two lone pairs) about the central chlorine atom, so ClF<sub>3</sub> does not obey octet rule.</span></span></p> | |
| 88. |
The shape of covalent molecule AX3 is : (a) T-shape (b) triangular (c) pyramidal (d) Any of the above three depending upon the number of lone pairs on A |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) Any of the above three depending upon the number of lone pairs on A</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">Shape of the molecule depends upon a total number of electron pairs around the central atom.</span></span></p> | |
| 89. |
Nessler’s reagent is represented by : (a) K2[HgI4] + KOH (b) K2[HgI2] (c) HgI (d) K2[HgI3] |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) K<sub>2</sub>[HgI<sub>4</sub>] + KOH </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">Nessler’s reagent is represented by K<sub>2</sub>[HgI<sub>4</sub>] + KOH.</span></span></p> | |
| 90. |
In which of the following binary compound, the ratio rcation ⁄ranion is least? (a) CsF (b) LiF (c) LiI (d) CsI |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>Correct option (c) LiI </strong></span></p><p style="text-align: justify;"><span style="color:#000000"><strong>Explanation:</strong></span></p><p style="text-align: justify;"><span style="color:#000000">LiI has the least ratio of r<sub>cation</sub> ⁄r<sub>anion</sub></span></p> | |
| 91. |
When equal volumes of the following solutions are mixed, precipitation of AgCl (Ksp = 1⋅8 × 10−10) will occur only with : (a) 10−10 M (Ag+ ) and 10−10 M (Cl− ) (b) 10−4 M (Ag+) and 10−4 M (Cl− ) (c) 10−5 M (Ag+) and 10−5 M (Cl−) (d) 10−5 M (Ag+ ) and 10−6 M (Cl−) |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (b) 10<sup>−4</sup> M (Ag<sup>+</sup>) and 10<sup>−4</sup> M (Cl<sup>− </sup>)</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">Ionic product = [Ag<sup>+</sup> ][Cl<sup>−</sup> ] = 10<sup>−4</sup> × 10<sup>−4</sup> = 10<sup>−8 </sup></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">It is more than its given ionic product (1.8 × 10<sup>−10</sup>)</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">∴ So precipitation of AgCl will occur only with 10<sup>−4</sup> M(Ag<sup>+ </sup>) and 10<sup>−4 </sup> M(Cl <sup>−</sup> )</span></span></p> | |
| 92. |
Which has the maximum tendency to undergo E1 elimination ? (a) N-butyl bromide (b) Isobutyl bromide (c) Tertiary butyl bromide (d) Secondary butyl bromide |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (c) Tertiary butyl bromide</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">E<sub>1</sub> elimination takes place via the formation of a stable carbonium ion which is possible from a tertiary alkyl halide only.</span></span></p> | |
| 93. |
Which of the following compounds has the least tendency to form hydrogen bonds between molecules ? (a) NH4OH (b) CH3F (c) NH3 (d) HF |
| Answer» <p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong> Correct option (b) CH<sub>3</sub>F</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 hydrogen bond is formed if H is attached to highly electronegative atoms like F, O, N etc.</span></span></p> | |
| 94. |
Directions: Read the following passage carefully and answer the questions that follow. The young are those to whom we look for future strength and for future good; and the longer we live, the more anxious we become that they who are to be the fresh recruits should be morally of right stature. Around them are peculiar temptations and trials, witching, cunning, insidious and forceful and we are obliged to see thousands falling by the way, whose fall seems and needless. They like ourselves, are to have but one chance in life. We who are somewhat advanced in years, seeing how many perils there are round about that one chance, feel an earnest desire that every advantage should be given to those who are coming onto fill our places. We can live but once, and life is usually moulded and takes its shape very early.Which one of the following is correct? The author looks upon the young as (1) handsome and healthy. (2) an embodiment of possibilities(3) strong and hard working. (4) a group of boys and girls who are obedient and dutifu |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>The Correct option is (3) strong and hard working.</strong></span></span></p> | |
| 95. |
Choose the correct word to complete the sentences from the given choice :........ goes there ? (a) How (b) What (c) Whom (d) Their |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) Their</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">‘Who’ is used as an interrogative pronoun</span></span></p> | |
| 96. |
Directions: Read the following passage carefully and answer the questions that follow. The young are those to whom we look for future strength and for future good; and the longer we live, the more anxious we become that they who are to be the fresh recruits should be morally of right stature. Around them are peculiar temptations and trials, witching, cunning, insidious and forceful and we are obliged to see thousands falling by the way, whose fall seems and needless. They like ourselves, are to have but one chance in life. We who are somewhat advanced in years, seeing how many perils there are round about that one chance, feel an earnest desire that every advantage should be given to those who are coming onto fill our places. We can live but once, and life is usually moulded and takes its shape very early.What does the phrase morally of right stature mean? (1) Being highly educated (2) Having a good personality (3) Having rectitude (4) Feeling superior to others |
| Answer» <p></p><p class="MsoNormal"><span style="color:#000000"><strong><span style="background-color:white">The Correct option is (3) Having rectitude</span></strong></span></p><p></p> | |
| 97. |
Directions: In each of the following questions, out of the four alternatives given, choose the one which can be substituted for the given words or sentence.A person who believes that ideas have value only in terms of their practical consequence and that practical results are the sole test of the truth or validity of beliefs. (1) realist (2) optimist (3) pragmatist (4) utopian |
| 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) pragmatist</span></strong></span></p><p></p> | |
| 98. |
Directions: Read the following passage carefully and answer the questions that follow. The young are those to whom we look for future strength and for future good; and the longer we live, the more anxious we become that they who are to be the fresh recruits should be morally of right stature. Around them are peculiar temptations and trials, witching, cunning, insidious and forceful and we are obliged to see thousands falling by the way, whose fall seems and needless. They like ourselves, are to have but one chance in life. We who are somewhat advanced in years, seeing how many perils there are round about that one chance, feel an earnest desire that every advantage should be given to those who are coming onto fill our places. We can live but once, and life is usually moulded and takes its shape very early.Which one of the following is correct? The failure of many a young men and women is (1) well deserved (2) unwarranted (3) fortuitous (4) sad |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong><span style="background-color:white">The Correct option is (3) fortuitous</span></strong></span></span></p><p></p> | |
| 99. |
Choose synonym from the given words from each set.ANNESTY : (a) pardon (b) mercy (c) remission (d) punishment |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) punishment</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"> ‘Amnesty’ means pardon. Therefore, punishment is the antoym of amnesty.</span></span></p> | |
| 100. |
On warming a mixture of solid NaCl and K2Cr 2O7 produces a gas (1) orange coloured gas is produced. (2) which on passing into Pb(NO3 )2 solution produces yellow residue. (3) when passed in toluene produces, benzaldehyde. (4) all of the above. |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (4) all of the above.</strong></span></p> | |