CBSE Class 12 Chemistry 2020 Outside Delhi Set 1 Solved Paper

Question : 33 of 37

Marks: +1, -0

Arrange the following compounds as directed:
(i) In increasing order of solubility in water:

( {\CH}_3) _2 {\NH}, {\CH}_3 {\NH}_2, {\C}_6 {\H}_5 {\NH}_2

(ii) In decreasing order of basic strength in aqueous solution :

( {\CH}_3) _3 {\N}, ( {\CH}_3) _2 {\NH}, {\CH}_3 {\NH}_2

(iii) In increasing order of boiling point:

( {\C}_2 {\H}_5) _2 {\NH}, ( {\C}_2 {\H}_5) _3 {\N}, {\C}_2 {\H}_5 {\NH}_2

Solution:

(i) Increasing order of solubility:

{\C}_6 {\H}_5 {\NH}_2< ( {\CH}_3) _2 {\NH}< {\CH}_3 {\NH}_2

(ii) Decreasing order of basic strength in aqueous solution:

( {\CH}_3) _2 {\NH}> ( {\CH}_3) _3 {\N}> {\CH}_3 {\NH}

(iii) Increasing order of boiling point:

( {\C}_2 {\H}_5) _3 {\N}< ( {\C}_2 {\H}_5) _2 {\NH}< {\C}_2 {\H}_5 {\NH}_2

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