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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.
| 101. |
If the mass defect of 4X9 is 0⋅09 a.m.u, then the binding energy per nucleon is : (a) 8.38 MeV(b) 83⋅8 MeV (c) 931⋅5 MeV (d) 9⋅315 MeV |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) 9⋅315 MeV</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">Binding energy of nucleus = Mass defect in amu × 931.48 MeV</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= 0.09 × 931.48</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= 83.83 MeV</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Binding energy per nucleon</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= binding energy of the nucleus/number of nucleon (mass number)</span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">= 83.83/9 = 9.315 MeV</span></span></p> | |
| 102. |
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 that part which has an error and mark accordingly.(a)(1) The teacher (2) together with his (3) wife and daughter (4) were drowned(b)(1) No sooner did the thief (2) see the policeman (3) that he jumped over the wall (4) and ran away |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong><span style="font-size:11pt; line-height:115%">The Correct option is </span></strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(a)</strong>(4) were drowned</span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>(b)</strong>(3) that he jumped over the wall</span></span></p> | |
| 103. |
Commercial detergents contain mainly : (a) ROSO3Na (b) RONa (c) RCOONa (d) ROCH2CHORCH2OR |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (a) ROSO<sub>3</sub>Na</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">Commercial detergents contain mainly sodium alkyl sulphate ROSO<sub>3</sub>Na.</span></span></p> | |
| 104. |
Number of divisors of the form 4n + 2(n ≥ 0) of the integer 240 is (1) 4 (2) 8 (3) 10 (4) 3 |
| Answer» <p></p><p style="text-align:justify"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct Option (4) 3</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">(1) 240 = 2 4 × 3 × 5 </span></span></p><p style="text-align:justify"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Factors of 240 are the terms of (1 + 2 + 2<sup>2</sup> + 2<sup>3</sup> + 2<sup>4</sup> ) (1 + 3) (1 + 5) 4n + 2 = 2 (2n + 1) = 2 × odd number. </span></span></p><p style="text-align:justify"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">Such factors are 2 × 1, 2 × 3, 2 × 5, 2 × 15 These are four in number</span></span></p> | |
| 105. |
The phenomenon of syneresis is : (a) migration of colloid in an electric field (b) process of converting gel into a true solution (c) separation of the dispersed phase from the gel (d) formation of a sol from a gel |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (c) separation of the dispersed phase from the gel</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">Gels on standing shrink and the liquid enclosed is released, the process is called weeping of a gel or syneresis. Syneresis is the process of separation of the dispersed phase from gel.</span></span></p> | |
| 106. |
Which of following members of nitrogen family does not show negative oxidation state? (a) Bi (b) Sb (c) As (d) P |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) Bi </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">Bi (bismuth) does not show negative oxidation state because of very less electronegativity than hydrogen.</span></span></p> | |
| 107. |
A glass rod rubbed with piece of silk is brought near a rubber rod rubbed with a piece of wool. Then between them, there will be a force of : (a) attraction (b) repulsion (c) no force (d) repulsion and attraction both |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (a) attraction </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">When the glass rod is rubbed with silk, the rod acquires positive charge and when the rubber rod is rubbed with wool, the rod acquires negative charge. Again when the glass rod and rubber rod are brought close, they attract.</span></span></p> | |
| 108. |
For the structural analysis of crystal, X−rays are used bacause : (a) X−rays have wavelength of the order of interatomic spacing (b) X−rays are highly penetrating radiations (c) wavelength of X−rays is of the order of nuclear size (d) X−rays are coherent radiations |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) X−rays have wavelength of the order of interatomic spacing</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">The diffraction of X-rays can take place only when spacing between two adjacent planes is of the order of wavelength of X-rays. It happens so in case of crystals. So, X-rays are used for structural analysis of crystals.</span></span></p> | |
| 109. |
The ratio of the radii of the planets P1 and P2 is k. The ratio of acceleration due to gravity is r. The ratio of the escape velocities from them will be(1) kr(2) √kr(3) √(k/r)(4) √(r/k) |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong>The Correct Option is <span style="font-family:Arial,Helvetica,sans-serif; text-align:justify">(2) √kr</span></strong></span></p><p class="MsoNormal"></p><p></p> | |
| 110. |
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) A terrific hue and cry (2) was raised (3) at the new tax proposals (4) no error |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (1) A terrific hue and cry</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">'A big hue and cry' in place of 'A terrific hue and cry'.</span></span></p> | |
| 111. |
In the circuit shown, X, Y are inputs and Z is the output. The values of inputs for which the output Z = 0 are(1) X = 0, Y = 0 (2) X = 0, Y = 1 (3) X = 1, Y = 1 (4) X = 1, Y = 0 |
| Answer» <p><span style="color:#000000"><strong><span style="font-family:Calibri,sans-serif; font-size:18px">The Correct Option is </span>(3) X = 1, Y = 1</strong></span></p> | |
| 112. |
Foot is related to shoe, in the same way Neck is related to : (a) necklace (b) cut (c) beauty (d) ornament |
| Answer» <p style="text-align:justify"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) cut</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">As shoe is used in foot and necklace is used in neck.</span></span></p> | |
| 113. |
Engineer : Machine :: Doctor : (a) disease (b) medicine (c) hospital (d) none of these |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; font-family:Arial,sans-serif">Correct option (a) disease</span></strong></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; font-family:Arial,sans-serif">Explanation:</span></strong></span></p><p style="text-align: justify;"><span style="color:#000000">As the engineer is directly related ti machines similarly doctor is related to diseases.</span></p> | |
| 114. |
Tea : Leaves :: Coffee : (a) plant (b) seeds (c) beverage (d) stimulant |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; font-family:Arial,sans-serif">Correct option (b) seeds</span></strong></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong><span style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; font-family:Arial,sans-serif">Explanation:</span></strong></span></p><p style="text-align: justify;"><span style="color:#000000">Coffee is obtained from seeds.</span></p> | |
| 115. |
The electrolytic bath used in gold plating of copper articles, contains : (a) KCN + AuCl3 (b) CuSO4 (c) AuCl3 (d) molten gold |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) KCN + AuCl<sub>3</sub></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">KCN and AuCl<sub>3</sub> combine together forming a complex salt K[Au(CN)<sub>4</sub>]. This complex salt releases gold slowly giving co-herent gold film on the article to be gold plated.</span></span></p> | |
| 116. |
Match List I with List II and select the correct answer from the codes given below the Lists:List IList IIA. AluminiumP. Reduction of oxide with coke in furnaceB. CopperQ. Leaching sulphide ore with KCN and precipitating the metal on adding ironfilling. C. IronR. Electrolytic reduction of molten halide oreD. SilverS. Electrolytic reduction of molten oxide ore T. Partlly oxidising the sulphide ore in air, and its reduction to the metal by the sulphide ore |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (2) S T P Q</strong></span></p> | |
| 117. |
Fundamental forces are thought to arise due to exchange of some mediating particles. The range of force Ro depends on mass m of mediating particle in the following way(1) Ro ∝ m(2) Ro ∝ √m(3) Ro ∝ 1/√m(4) Ro ∝ 1/m |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (4) R<sub>o</sub> ∝ 1/m</span></span></p><p></p> | |
| 118. |
Choose the wrong statement among the following properties of transition metals. (1) They show variable oxidation states. (2) They form complexes. (3) They show magnetic properties. (4) They do not form coloured compounds. |
| Answer» <p><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option is (4) They do not form coloured compounds.</strong></span></span></p> | |
| 119. |
Directions:In the questions given two statements A and B are followed by four conclusions C, D, E and F. Assume the two given statements to be true even if they vary from commonly known facts. Read all the conclusions and decide which of the given conclusions logically follows the two given statements.Statements: A. All bananas are apples. B. All apples are oranges. Conclusions: C. Some oranges are apples. D. All apples are bananas. E. Some bananas are not oranges.F. Some oranges are bananas. (1) All follow (2) Only C and F follow (3) Only C and E follow (4) Only C follows |
| Answer» <p><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong><span style="font-size:11pt">The Correct option is </span>(2) Only C and F follow</strong></span></span></p> | |
| 120. |
Choose the incorrect word in the given sentences. Shree brought three dozens of oranges : (a) oranges (b) dozens (c) of (d) brought |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (b) dozens</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"> ‘Dozen’ is never used in plural. Therefore, in place of ‘dozens’ dozen will come. </span></span></p> | |
| 121. |
Choose the incorrect word in the given sentences. Can your child recognise English aphabets ? (a) Alphabets (b) Your (c) Recognise (d) Can |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) Alphabets</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">‘Alphabet’ is never used in plural. Therefore, in place of ‘alphabets’ alphabet will come. </span></span></p> | |
| 122. |
If two meters X and Y require 40 mA and 50 mA respectively to give full scale deflection, then (1) X is more sensitive (2) Y is more sensitive (3) both X and Y are equally sensitive (4) it would not be possible to assess the sensitivity on the basis of given data |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (1) X is more sensitive</span></span></p> | |
| 123. |
Non-proteinous substance which contain enzymes require for the activity is called (1) catalyst (2) inhibitors (3) co-enzymes (4) biocatalyst |
| Answer» <p style="text-align: justify;"><span style="font-size:16px"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong><span style="line-height:115%">The Correct option is (3) co-enzymes</span></strong></span></span></span></p> | |
| 124. |
Choose the incorrect word in the given sentences. Our college has good furnitures : (a) good (b) has (c) our (d) furnitures |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (d) furnitures</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">‘Furniture’ is always used in singular. Therefore, in place of ‘furnitures’ furniture will come.</span></span></p> | |
| 125. |
The temperature to which a gas must be cooled for liquefaction by applying pressure is known as (1) Boyle's temperature (2) critical temperature (3) transition temperature (4) inversion temperature |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The temperature to which a gas must be cooled for liquefaction by applying pressure is known as </span></span><strong><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">transition te</span></span>mperature.</strong></p> | |
| 126. |
Choose synonym from the given words from each set. ABSOLUTION : (a) amnesty (b) charge (c) conviction (d) sensual |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>Correct option (a) amnesty</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">‘Absolution’ means pardon and ‘amnesty’ means general pardon to political offender. Therefore,</span></p> | |
| 127. |
The reason for the change in shape of a regular body is : (a) metallic strain (b) longitudinal strain (c) shearing strain (d) volume stress |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong>Correct option (c) shearing strain</strong></span></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong>Explanation:</strong></span></p><p style="text-align: justify;"><span style="color:#000000">A body undergoes a change in shape without change in volume.</span></p> | |
| 128. |
a) the repairs b) repairs c) the repair d) repair |
| Answer» <p><span style="color:#000000">Answer: repair</span></p> | |
| 129. |
Correct order of nucleophilicity is(1) CH-3 > NH- 2 > OH- > F- (2) CH-3 > OH- > F- > NH- 2 (3) F- > NH-2 > OH- > CH-3 (4) F- > OH- > NH- 2 > CH-3 |
| Answer» <p><span style="color:#000000"><strong>The Correct option is <span style="font-family:Arial,Helvetica,sans-serif; text-align:justify">(2) CH</span><sup style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">-</sup><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">3</sub><span style="font-family:Arial,Helvetica,sans-serif; text-align:justify"> > OH</span><sup style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">-</sup><span style="font-family:Arial,Helvetica,sans-serif; text-align:justify"> > F</span><sup style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">-</sup><span style="font-family:Arial,Helvetica,sans-serif; text-align:justify"> > NH</span><sup style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">-</sup><span style="font-family:Arial,Helvetica,sans-serif; text-align:justify"> </span><sub style="color:#000000; font-family:Arial,Helvetica,sans-serif; text-align:justify">2</sub><span style="font-family:Arial,Helvetica,sans-serif; text-align:justify"> </span></strong></span></p> | |
| 130. |
Which of the following reactions does not yield an alkyl halide? |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (3) C<sub>2</sub> H<sub>5</sub>OC<sub>2</sub> H<sub>5</sub> + Cl<sub>2</sub> <em style="font-size:14pt; font-style:italic">→</em></span></span></p> | |
| 131. |
When the two frequencies are identical in small oscillations, the system is known as (1) resonance (2) oscillator (3) degenerate (4) linear |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (3) degenerate</span></span></p> | |
| 132. |
Which is not true? The electronic devices are capable of performing the functions of a (1) rectifier (2) generator (3) amplifier (4) modulator |
| Answer» <p style="text-align:justify"><span style="font-size:18px"><strong><span style="color:#000000"><span style="font-family:Calibri,sans-serif">The Correct option is </span>(2) generator</span></strong></span></p> | |
| 133. |
For detecting light intensity, we use (1) photodiode in reverse bias (2) photodiode in forward bias (3) LED in reverse bias (4) LED in forward bias |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">The Correct option is (1) photodiode in reverse bias</span></span></p> | |
| 134. |
Degenerate orbitals are those in which electrons contain (1) same orientation (2) same wave function (3) same energy (4) same spin |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><strong>The Correct option is (3) same energy</strong></span></p> | |
| 135. |
Complete the series.7, 11, … 17, 19, 23 : (a) 15 (b) 19 (c) 13 (d) 4 |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (c) 13</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">This series shows that all number in increasing order. Therefore, number in blank space will be 13.</span></span></p> | |
| 136. |
Silicon is the main constituent of : (a) plants (b) rocks (c) alloys (d) animals |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (c) alloys</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">Silicon is the main constituent of alloys.</span></span></p> | |
| 137. |
A system is in normal population only when the number of atoms in the _____ . (1) excited state is more (2) ground state is more (3) excited state is equal to ground state (4) none of the above |
| 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 (2) ground state is more </span></strong></span></span></p> | |
| 138. |
Which of the following is known as Aqua-regia ? (a) 3HCl + HNO3 (b) 3HNO3 + HCl (c) H3PO4 + H2SO4 (d) HCl + CH3COOH |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) 3HCl + HNO<sub>3</sub></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">Aqua regia is the mixture of three parts of conc. HCl and one part of HNO<sub>3</sub>.</span></span></p> | |
| 139. |
Silver bromide is used in photography because it is : (a) soluble in NH4OH (b) insoluble in acids (c) photosensitive (d) soluble in hypo-solution |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (c) photosensitive</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">Silver halides are used in photography because they are photosensitive in nature and on exposure to light are easily reduced to metallic silver by mild reducing agents like hydroquinone, ferrous oxalate etc.</span></span></p> | |
| 140. |
Given (A): The material of the cathode in a thermionic emitter should have a small work function. (R): This is to facilitate electron emission only when large heat is supplied (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 |
| Answer» <p style="text-align: justify;"><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 (3) A is true but R is false </span></strong></span></span></p> | |
| 141. |
A liquid with coefficient of volume expansion γ is filled in a container of a material having the coefficient of linear expansion α. If the liquid over flows on heating : (a) γ = 3α (b) γ > 3α (c) γ < 3α (d) γ > 3α3 |
| Answer» <p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) γ > 3α</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 the level of liquid increases, remains same or becomes down. On account of the coefficient of cubical expansion of liquid γ is more, equal and less than the cubical expansion of the metal of container. Hence, when liquid is heated, it will overflow so that cubical expansion will be greater than 3α.</span></span></p> | |
| 142. |
A material is supplied with heat at constant rate. The temperature of the material is changing with the heat as shown in the diagram. If CD = 2AB, (1) material is an alloy of two metals (2) material has different values of specific heat at different temperatures (3) latent heat of vaporisation is double the latent heat of fusion (4) At AB and CD, material disintegrates into fragments |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct option is (3) latent heat of vaporisation is double the latent heat of fusion</strong></span></span></p><p></p> | |
| 143. |
Given two statements: A: BaTiO3 is a piezoelectric material and is used in a record player . R: In a piezoelectric transducer, stress induces polarization and an electric field strains the material. (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. |
| Answer» <p></p><p class="MsoNormal" style="text-align: justify;"><span style="color:#000000"><strong>The Correct Option is (4) A is false but R is true.</strong></span></p><p class="MsoNormal"></p><p></p> | |
| 144. |
The Matte obtained by smelting copper pyrites with coke and sand contains mainly : (a) FeS + ZnS (b) Cu2S + FeS (c) CuS + FeS2 (d) ZnS + CuS |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) Cu<sub>2</sub>S + FeS</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">Copper pyrites on smelting with coke and sand mainly contain a black mixture of Cu<sub>2</sub>S and a little FeS. (which escapes from oxidation) is obtained. This black mixture is known as ‘‘Matte’’.</span></span></p> | |
| 145. |
In the metal carbonyls of general formula M(COx), where m = metal, x = 4 the metal is bonded to : (a) oxygen (b) carbon (c) carbon and oxygen (d) C≡ O triple bond |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (b) carbon </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">Bonding in metal carbonyls occurs through carbon of carbon monoxide.</span></span></p> | |
| 146. |
The carbon atoms in diamond are bonded to each other in (1) a linear configuration (2) a planar configuration (3) an octahedral configuration (4) a tetrahedral configuration |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-size:16px"><span style="font-family:Arial,Helvetica,sans-serif"><strong><span style="background-color:white">The Correct option is (4) a tetrahedral configuration</span></strong></span></span></span></p> | |
| 147. |
The foot of the perpendicular from (1, 2, 3) on y-axis is : (a) (0, 0, 3) (b) (0, 0, 0) (c) (0, 2, 0) (d) (3, 0, 0) |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (c) (0, 2, 0) </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"> The co-ordinates of the foot of the perpendicular from point P or p (a, b, c) on y-axis is (0, 4, 0). </span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">∴ Foot of perpendicular from (1, 2, 3) on y-axis is (0, 2, 0). </span></span></p> | |
| 148. |
Which one of the following configurations is correct for alkaline earth elements ? (a) 1s2 2s2 2p3 (b) 1s2 2s2 2p6 3s2 (c) 1s2 2s2 2p6 3s2 3p2 (d) 1s2 2s2 2p6 |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) 1s<sup>2 </sup>2s<sup>2</sup> 2p<sup>6</sup> 3s<sup>2</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">Alkaline earth metals are s-block, normal elements having ns<sup>2</sup> general electronic configuration.</span></span></p> | |
| 149. |
The relation between current and voltage in an AC circuit is shown. What is the circuit?(1) LR (2) CR (3) C alone (4) R alone |
| Answer» <p></p><p class="MsoNormal"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>The Correct option is (3) C alone</strong></span></span></p><p></p> | |
| 150. |
Which of the quantities : (I) magnetic declination and (II) dip is/are used to determine the strength of earth’s magnetic field at a point on the earth surface ? (a) both I and II (b) neither I nor II (c) I only (d) II only |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) both I and II</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 we measure horizontal component of earth’s magnetic field and angle of dip, then the strength of earth’s magnetic field can be found out.</span></span></p> | |