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Carbon Dioxide

The amount of...

Question

The amount of calcium oxide formed by the dissociation of 25 g of calcium carbonate is:

A

7 g

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B

14 g

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C

28 g

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D

56 g

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Solution

The correct option is C 14 g
Reaction:
$C a C O_{3} \to C a O + C O_{2}$
100 gm 56 gm
So $C a O$ formed by 25gm calcium carbonate is $25 \times 56 / 100 = 14 g m$

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