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Q)

Pearl ash is

$\begin{array}{1 1}(a)\;NaCl&(b)\;K_2CO_3\\(c)\;NaHCO_3&(d)\;KHCO_3\end{array}$

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A)
Potassium carbonate is the primary component of potash and the more refined pearl ash or salts of tartar.
Potassium carbonate $(K_2CO_3)$ is a white salt, soluble in water (insoluble in ethanol) which forms a strongly alkaline solution.
It can be made as the product of potassium hydroxide's absorbent reaction with carbon dioxide.
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