Question:
Which of the following is NOT correctly matched with its common name?
Which of the following is NOT correctly matched with its common name?
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Gypsum = dihydrate; POP = hemihydrate.
Updated On: Jun 17, 2026
- Dead burnt plaster - CaSO$_4$
- Quick lime - CaO
- Slaked lime - Ca(OH)$_2$
- Gypsum - CaSO$_4\cdot \tfrac{1}{2}H_2O$
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Quick lime is CaO → correct match.
Step 2: Slaked lime is Ca(OH)$_2$ → correct match.
Step 3: Dead burnt plaster is anhydrous CaSO$_4$ → correct match.
Step 4: Gypsum is CaSO$_4\cdot2H_2O$, not hemihydrate.
Step 5: CaSO$_4\cdot\frac{1}{2}H_2O$ is plaster of Paris, not gypsum.
Step 6: Hence option (D) is incorrect matching.
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