NCERT Class 12 Chemistry very short Questions & Answers
32 In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Answer: Assertion and reason both are incorrect statements.
33 Relative lowering of vapour pressure is a colligative property because ________ .
Answer: It depends on the concentration of a non electrolyte solute in solution and does not depend on the nature of the solute molecules.
34 Benzoic acid, when dissolved in benzene, which of the following is correct.
Answer: The benzoic acid will undergo association.
35 In the commercial electrochemical process for aluminium extraction, electrolyte used is
Answer: A molten mixture of Al2O3 and Na3AlF6.
37 The polymer containing strong intermolecular H-bonding and crystalline nature is
Answer: Nylon 6, 6
39 3g of activated charcoal was added to 50 ml of acetic acid solution (0.06 M) in a flask. After an hour it was filtered and the strength of filtrate was found to be 0.042 M. The amount of acetic acid adsorbed per gram of charcoal is
Answer: 54 mg
40 During the adsorption of gas on the surface of solid, which of the following is true?
Answer: ?G < 0, ?H < 0, ?S < 0