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Q.

KCIO3  decomposes to KCI and O2. If  the volume of O2 obtained in this reaction is 1.12 lit at STP, weight of KCI formed in the reaction is

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a

7.45 grams

b

4.96 grams

c

1.24 g

d

2.48 grams

answer is B.

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Detailed Solution

2KClO32KCl+3O2

3 mole O2=2 mole KCl

1 mole O2=23mol.Kcl

22.4 LtO2=23×74.6 grams

11.2  Lt O2=13×74.6 grams =24.8 grams

1.12 Lt of O2=2.48 grams

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KCIO3  decomposes to KCI and O2. If  the volume of O2 obtained in this reaction is 1.12 lit at STP, weight of KCI formed in the reaction is