CBSE Class 10 Science 2016 Term II Outside Delhi Set 1

Question : 19 of 36

Marks: +1, -0

A carbon compound '

P

' on heating with excess conc.

{\H}_2 {\SO}_4

forms another carbon compound '

{\Q}

' which on addition of hydrogen in the presence of nickel catalyst forms a saturated carbon compound 'R'. One molecule of '

R

' on combustion forms two molecules of carbon dioxide and three molecules of water. Identify

P, Q

and

R

and write chemical equations for the reactions involved.

Solution:

{\P}=\;\text " Ethyl alcohol "\; ( {\C}_2 {\H}_5 {\OH})

{\Q}=\;\text " Ethene "\; ( {\CH}_2= {\CH}_2)

{\R}=\;\text " Ethane "\; ( {\C}_2 {\H}_6)

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