A sample of CaCO₃ is 50% pure. On heating 1.12 L of CO₂ at STP is obtained. Residue left(assuming non volatile impurity) is

Options

(a) 7.8 g
(b) 3.8 g
(c) 2.8 g
(d) 8.9 g

Correct Answer:

7.8 g

Explanation:

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