Question

When 32.25 g of ethyl chloride is subjected to dehydrohalogenation reaction, the yield of alkene formed is 50%. The mass of the product formedis (at. mass of chlorine = 35.5)

• A. 14 g
• B. 28g
• C. 64.5 g
• D. 7 g

Answer 1

Answer: (D)

Molar mass of ethyl chloride
$=2\times 12+5\times 1+1\times 35.5$
$=24+9+35.5=64.5gmo{l}^{-1}$
Molar mass of ethene $=2+12+4\times 1$
$=28gmo{l}^{-1}$
Actual yield $=50\%$ of $28g=14g$
$64.5g$ of ethyl chloride on dehydrohalogenation gives $14g$ ethene
$\therefore 32.25g$ of ethyl chloride on dehydrohalo- genation will give ethene $=7g$