Table salt is contaminated with $N a H C O_{3}$ due to presence of $M g C l_{2}$ as impurity (from sea).
If true enter 1, else enter 0.

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Solution

Table salt, $N a C l$ has also $M g C l_{2}$ as impurity (from sea). The magnesium salt is hygroscopic; that is it picks water up from the air and thus, $N a C l$ becomes wet.
If $N a H C O_{3}$ is added to table salt, it converts $M g C l_{2}$ to $M g C O_{3}$ which is non-hygroscopic salt.
$M g C l_{2} + 2 N a H C O_{3} \to M g C O_{3} + N a C l + H_{2} O + C O_{2}$
Hence, the given statement is true.

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