ICSE Class 10 Chemistry Question 23 of 23

Model Paper 2 — Question 23

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Question 8(iv)

The formulae of some organic compounds are:

A

Ethene structure. Organic Chemistry, Simplified Chemistry Dalal Solutions ICSE Class 10.

B

Write structural formula of ethanol. Organic Chemistry, Simplified Chemistry Dalal Solutions ICSE Class 10.

C

Structural formula for Methane. Organic Chemistry, Simplified Chemistry Dalal Solutions ICSE Class 10

D

The formulae of some organic compounds are: Model Paper 2, Concise Chemistry Solutions ICSE Class 10

(a) Write an equation for the preparation of A using B.

(b) Name the compound formed when B and D reacts in presence of a mineral acid.

(c) Write an equation for the preparation of C.

Answer

(a) By heating ethyl alcohol with concentrated H2SO4 at 170°C.

C2H5OH ethyl alcohol170°CConc. H2SO4[excess]C2H4ethene+H2\underset{\text{ ethyl alcohol}}{\text{C}_2\text{H}_5\text{OH}} \xrightarrow[170\degree\text{C}]{\text{Conc. H}_2\text{SO}_4\text{[excess]}} \underset{ \text{ethene}}{\text{C}_2\text{H}_4} + \text{H}_2\text{O}\

(b) Ethyl ethanoate

(c) CH3COONa sodium acetate+NaOHsodalime300°CCaOCH4methane+Na2CO3\underset{\text{ sodium acetate}}{\text{CH}_3\text{COONa}} + \underset{\text{sodalime}}{\text{NaOH}} \xrightarrow[300\degree\text{C}]{\text{CaO}} \underset{\text{methane}}{\text{C}\text{H}_4}↑ + \text{Na}_2\text{CO}_3