Question

Compound A on reaction with ethanoic acid gives out gas B which turns limewater milky. Choose the option correctly depicting compounds A and B.

• A. $NaCl,C{O}_2$
• B. $N{a}_{2}C{O}_3,O_2$
• C. $N{a}_{2}C{O}_3,C{O}_2$
• D. $NaCl,O_2$

Answer 1

The correct option is C $N{a}_{2}C{O}_3,C{O}_2$

• Gas B turns lime water milky. So, definitely it is CO 2 gas.
• Sodium carbonate or sodium hydrocarbonate on reaction with ethanoic acid gives out $C{O}_2$gas.
• The reaction is: $2C{H}_{3}COOH\left(aq\right)+N{a}_{2}C{O}_3\left(s\right)\to C{H}_{3}COONa\left(aq\right)+H_{2}O\left(l\right)+C{O}_2\left(g\right)$
• So, the correct option is B.