Complete the following reactions: from Class 12 CBSE Previous Y

Subject

Chemistry

Class

CBSE Class 12

Pre Boards

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Sample Papers

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 Multiple Choice QuestionsShort Answer Type

41.

Which class of drugs is used in sleeping pills?

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42.

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

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43.

Complete the following reactions:


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 Multiple Choice QuestionsLong Answer Type

44.

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

 

where Ea is the activation energy.

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

(R = 8.314 JK-1 mol-1)

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45.

How will you bring about the following conversions?

 (i) Propanone to propane

(ii) Benzoyl chloride to benzaldehyde

(iii) Ethanal to but-2-enal

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46.

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

(i) Ethanal and Propanal

(ii) Benzoic acid and Phenol

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