Question

an organic compound A of molecular formula C2 H6 on heating with excess of h concentrated H2 S o4 gives compound B of molecular formula C2 H4 compound which on addition reaction gives compounds of molecular formula C2 H6

(A) Name A, B, C
(B) Write the chemical equations for conversion of A to B
(C) What is the role of concentrated H2SO4 in above equation

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Answer 1

A) Compounds are

A-Ethane(CH3-CH3)

B-Ethene(CH2=CH2)

C-Ethane(CH3-CH3)

B)For this, we will first convert H2SO4 into constituent ions.

C2H6----(In presence of H2SO4)-->C2H4.

C)The role of H2SO4 is to act as an oxidising agent to remove H2 from ethane

Answer 2

A) Compound A - Ethane ( C2H6 )

Compound B - Ethene ( C2H4 )

Compound C - Ethane ( C2H6 )

B) Convertion of Ethane to Ethene

Hot conc.

CH2CH3OH ------------> CH2=CH2 + H2O

H2SO4

C) Hot concentrated H2SO4 (sulphuric acid) here acts as an dehydrating agent. It dehydrates ethane to give Ethene and water. Water is given out , so , it shows that ethane is dehydrated by H2SO4 .

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