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Silica

Thus A, B, C,...

Question

Thus A, B, C, D and E are $C a C_{2} O_{4}$ , $C O$ , $C O_{2}$ , $C a O$ and $C a (O H)_{2}$
if true enter 1, else enter 0.

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Solution

The correct option is A 1
The colourless salt A is calcium oxalate.
It decomposies on heating to form calcium oxide (D) , CO (B) and carbon dioxide (C).
$C a_{2} C_{2} O_{4} + Δ - \to C a O + C O ↑ + C O_{2} ↑$
Calcium oxide dissolves in water to form calcium hydroxide (E).
$C a O + H_{2} O \to C a (O H)_{2}$
Carbon dioxide turns solution of calcium hydroxide milky.
$C a (O H)_{2} + C O_{2} \to C a C O_{3} + H_{2} O$ .

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