Chemistry MCQs for NEET — Practice Questions with Answers

Match List I with List II:

List I (Mixture) — A. CHCl₃ + C₆H₅NH₂, B. Crude oil in petroleum industry, C. Glycerol from spent-lye, D. Aniline - water

List II (Method of Separation) — I. Distillation under reduced pressure, II. Steam distillation, III. Fractional distillation, IV. Simple distillation

Choose the correct answer:

For the reaction $\text{A(g)} \rightleftharpoons 2\text{B(g)}$, the backward reaction rate constant is higher than the forward reaction rate constant by a factor of 2500, at 1000 K. [Given: $R = 0.0831\ \text{L atm mol}^{-1}\text{K}^{-1}$] $K_p$ for the reaction at 1000 K is:

Given below are two statements:

Statement I: Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at 273–278 K. It decomposes easily in the dry state.

Statement II: Insertion of iodine into the benzene ring is difficult and hence iodobenzene is prepared through the reaction of benzenediazonium salt with KI.

In the light of the above statements, choose the most appropriate answer:

How many products (including stereoisomers) are expected from monochlorination of the following compound: $(\text{CH}_3)_2\text{CH–CH}_2\text{–CH}_3$ (2-methylbutane)?

Among the given compounds I–III, the correct order of bond dissociation energy of the C–H bond marked with * is:

Which one of the following compounds does NOT decolourize bromine water?

The major product of the following reaction is: $\text{C}_6\text{H}_5\text{COCH}_2\text{CH}_2\text{CN} \xrightarrow{\text{(i) CH}_3\text{MgBr (excess)}}\xrightarrow{\text{(ii) H}_3\text{O}^+}$

Which of the following aqueous solution will exhibit highest boiling point?

Match List-I with List-II:

List-I — A. Haber process, B. Wacker oxidation, C. Wilkinson catalyst, D. Ziegler catalyst

List-II — I. Fe catalyst, II. PdCl₂, III. [(PPh₃)₃RhCl], IV. TiCl₄ with Al(CH₃)₃

Choose the correct answer:

5 moles of liquid X and 10 moles of liquid Y make a solution having a vapour pressure of 70 torr. The vapour pressures of pure X and Y are 63 torr and 78 torr respectively. Which of the following is true regarding the described solution?