JEE Advanced 2017 · Paper 2

Which of the following combination will produce H₂ gas?

1. AFe metal and conc. HNO₃
2. BCu metal and conc. HNO₃
3. CZn metal and NaOH(aq)
4. DAu metal and NaCN(aq) in the presence of air

The order of the oxidation state of the phosphorus atom in H₃PO₂, H₃PO₄, H₃PO₃, and H₄P₂O₆ is

1. AH₃PO₃ > H₃PO₂ > H₃PO₄ > H₄P₂O₆
2. BH₃PO₄ > H₃PO₂ > H₃PO₃ > H₄P₂O₆
3. CH₃PO₄ > H₄P₂O₆ > H₃PO₃ > H₃PO₂
4. DH₃PO₂ > H₃PO₃ > H₄P₂O₆ > H₃PO₄

The correct statement(s) about surface properties is(are)

1. AAdsorption is accompanied by decrease in enthalpy and decrease in entropy of the system
2. BThe critical temperatures of ethane and nitrogen are 563 K and 126 K, respectively. The adsorption of ethane will be more than that of nitrogen on same amount of activated charcoal at a given temperature
3. CCloud is an emulsion type of colloid in which liquid is dispersed phase and gas is dispersion medium
4. DBrownian motion of colloidal particles does not depend on the size of the particles but depends on viscosity of the solution

For a reaction taking place in a container in equilibrium with its surroundings, the effect of temperature on its equilibrium constant K in terms of change in entropy is described by

1. AWith increase in temperature, the value of K for exothermic reaction decreases because the entropy change of the system is positive
2. BWith increase in temperature, the value of K for endothermic reaction increases because unfavourable change in entropy of the surroundings decreases
3. CWith increase in temperature, the value of K for endothermic reaction increases because the entropy change of the system is negative
4. DWith increase in temperature, the value of K for exothermic reaction decreases because favourable change in entropy of the surroundings decreases

In a bimolecular reaction, the steric factor P was experimentally determined to be 4.5. The correct option(s) among the following is(are)

1. AThe activation energy of the reaction is unaffected by the value of the steric factor
2. BExperimentally determined value of frequency factor is higher than that predicted by Arrhenius equation
3. CSince P = 4.5, the reaction will not proceed unless an effective catalyst is used
4. DThe value of frequency factor predicted by Arrhenius equation is higher than that determined experimentally

Among the following, the correct statement(s) is(are)

1. AAl(CH₃)₃ has the three-centre two-electron bonds in its dimeric structure
2. BBH₃ has the three-centre two-electron bonds in its dimeric structure
3. CAlCl₃ has the three-centre two-electron bonds in its dimeric structure
4. DThe Lewis acidity of BCl₃ is greater than that of AlCl₃

The option(s) with only amphoteric oxides is(are)

1. ACr₂O₃, BeO, SnO, SnO₂
2. BCr₂O₃, CrO, SnO, PbO
3. CNO, B₂O₃, PbO, SnO₂
4. DZnO, Al₂O₃, PbO, PbO₂

W and X are, respectively

1. AO₃ and P₄O₆
2. BO₂ and P₄O₆
3. CO₂ and P₄O₁₀
4. DO₃ and P₄O₁₀

Y and Z are, respectively

1. AN₂O₃ and H₃PO₄
2. BN₂O₅ and HPO₃
3. CN₂O₄ and HPO₃
4. DN₂O₄ and H₃PO₃