Calculate the amount of lime obtained by heating 400 kg of limestone.

56 kg

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112 kg

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224 kg

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280 kg

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Solution

The correct option is B 224 kg
The chemical equation for decomposition of limestone can be written as:

$C a C O_{3} \to C a O + C O_{2}$

100 kg of $C a C O_{3}$ produces 56 kg of $C a O$ .

400 kg of $C a C O_{3}$ produces $\frac{56 \times 400}{100}$ $= 224$ kg.

Hence, option C is correct.

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