Question 54: Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in presence of calcium oxide is :
(1) 30
(2) 18
(3) 16
(4) 32
Answer: Option (4)
Explanation:
When sodium ethanoate is heated with sodium hydroxide in the presence of calcium oxide (soda lime), decarboxylation occurs.
The reaction is:
\mathrm{CH_3COONa + NaOH \xrightarrow{CaO} CH_4 + Na_2CO_3}The organic compound formed in this reaction is methane, \mathrm{CH_4}.
Molar mass of methane is:
12 + 4 \times 1 = 16 \ \mathrm{g\,mol^{-1}}Weight of two moles of methane is:
2 \times 16 = 32 \ \mathrm{g}Hence, the correct option is Option (4).