List - I List - II (A) CaO (P) Formed by decomposotion of CaCO 3 (B) Ca ( OH ) 2 (Q) Formed by treating quick lime with water (C) CaSO 4 ⋅ 2 H 2 O (R) Formed by action of H 2 SO 4 or solub

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List - I List - II (A) CaO (P) Formed by decomposotion of CaCO 3 ​ (B) Ca ( OH ) 2 ​ (Q) Formed by treating quick lime with water (C) CaSO 4 ​ ⋅ 2 H 2 ​ O (R) Formed by action of H 2 ​ SO 4 ​ or soluble- sulphate on any soluble calcium salt. (D) CaSO 4 ​ ⋅ 2 1 ​ H 2 ​ O (S) Formed by heating gypsum at 12 0 ∘ C (T) The colour of compound is white.

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(A) CaO matches (P) and (T) because it is produced by the thermal decomposition of calcium carbonate and is a white solid.

(B) Ca(OH)₂ matches (Q) and (T) because it is formed by reacting quicklime (CaO) with water and is white in color.

(C) CaSO₄ ⋅ 2H₂O (Gypsum) matches (R) and (T) as it can be precipitated from soluble calcium salts and is white.

(D) CaSO₄ ⋅ ½H₂O (Plaster of Paris) matches (S) and (T) because it is obtained by heating gypsum at $12 0^{\circ} C$ and is a white powder.

List - I	List - II
(A) CaO	(P) Formed by decomposotion of $CaCO_{3}$
(B) $Ca (OH)_{2}$	(Q) Formed by treating quick lime with water
(C) $CaSO_{4} \cdot 2 H_{2} O$	(R) Formed by action of $H_{2} SO_{4}$ or soluble- sulphate on any soluble calcium salt.
(D) $CaSO_{4} \cdot \frac{1}{2} H_{2} O$	(S) Formed by heating gypsum at $12 0^{\circ} C$
	(T) The colour of compound is white.

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