Question

The raw material in Solvay process are :
(1) $NaCl$
(2) $CaCO _{3}$
(3) $NH _{4} Cl$
(4) $CO _{2}$

• A. 1, 2 and 3 are correct
• B. 1 and 2 are correct
• C. 2 and 4 are correct
• D. 1 and 3 are correct

Answer 1

Answer: (A)

The raw materials in Solvay process. are :
$NaCl , CaCO _{3}$ and $NH _{4} Cl$
$NH _{3}+ H _{2} O + CO _{2} \longrightarrow NH _{4} HCO _{3}$
$NH _{4} HCO _{3}+ NaCl \longrightarrow NaHCO _{3} \downarrow+ NH _{4} Cl$
$2 NaHCO _{3} \xrightarrow{\Delta}Na _{2} CO _{3}+ H _{2} O + CO _{2}$
$Na _{2} CO _{3} \xrightarrow{\text { crystallization }} \underset{\text { washing soda }}{Na _{2}CO _{3} \cdot 1 OH _{2} O}$