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ICSE Class 10 Chemistry Question 16 of 19

Solved 2017 Question Paper ICSE Class 10 Chemistry — Question 16

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Question

Question 6(c)

Give a balanced chemical equation for each of the following:

(i) Preparation of ethane from Sodium propionate

(ii) Action of alcoholic KOH on bromoethane.

Answer

(i) Preparation of ethane from Sodium propionate:

C2H5COONasodium propionate+NaOHsodalime→ΔCaOC2H6ethane+Na2CO3\underset{\text{sodium propionate}}{\text{C}_2\text{H}_5\text{COONa}} + \underset{\text{sodalime}}{\text{NaOH}} \xrightarrow[\Delta]{\text{CaO}} \underset{\text{ethane}}{\text{C}_2\text{H}_6} + \text{Na}_2\text{CO}_3

(ii) Action of alcoholic KOH on bromoethane:

C2H5-Br Bromoethane [ethyl bromide]+KOH [aq.] alcoholic KOH→boilC2H5OH ethyl alcohol+KBr\underset{\text{ Bromoethane [ethyl bromide]}}{\text{C}_2\text{H}_5\text{-Br}} + \underset{\text{ alcoholic KOH}}{\text{KOH [aq.]}} \xrightarrow{\text{boil}} \underset{ \text{ ethyl alcohol}} {\text{C}_2\text{H}_5\text{OH}} + \text{KBr}