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JEE Main levelSingle correct optionDifficulty 2 of 3sb135

The calcium compound obtained as the by-product of the Solvay ammonia-soda process is:

A $CaCO X_{3}$
B $Ca (OH) X_{2}$
C $CaCl X_{2}$
D $CaSO X_{4}$

Answer: C

Ammonia is recovered by

Ca (OH) X_{2} + 2 NH X_{4} Cl CaCl X_{2} + 2 NH X_{3} + 2 H X_{2} O

. The slaked lime comes from

CaCO X_{3}

calcination, so

CaCl X_{2}

remains as the by-product.

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