41.

Which class of drugs is used in sleeping pills?

Although phenoxide ion has more number of resonating structures than Carboxylate ion, Carboxylic acid is a stronger acid than phenol. Give two reasons.

Complete the following reactions:

Rate constant ‘k’ of a reaction varies with temperature ‘T’ according to the equation:

where E_a is the activation energy.

When a graph is plotted for   a straight line with a slope of -4250 K is obtained. Calculate ‘E_a’ for the reaction.

(R = 8.314 JK^-1 mol^-1)

How will you bring about the following conversions?

 (i) Propanone to propane

(ii) Benzoyl chloride to benzaldehyde

(iii) Ethanal to but-2-enal

Give simple chemical tests to distinguish between the following pairs of compounds:

(i) Ethanal and Propanal

(ii) Benzoic acid and Phenol