Statement 1 is correct. Quick lime (CaO) is obtained by the calcination of comparatively pure limestone (CaCO3).
CaCO₃ → CaO + CO₂
Statement 2 is incorrect. Lime that can set and harden under water is called hydraulic lime, not fat lime. Fat lime requires
exposure to air for setting and does not set under water
Hence, Statement 1 is correct and Statement 2 is incorrect.
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