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Q.

The volume of air (containing 21% oxygen by volume) required to burn completely 1kg of carbon containing 100% combustible substances (C+O2→CO2) is 

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a

8.8889×103 lit

b

10.0999×103 lit

c

9.999×104 lit

d

11.111×105 lit

answer is A.

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Detailed Solution

C+O2→CO2

22.4 lit→12g of C

?→1×103g

1×10312×22.4=1.87×103 lits

100 lits of Air →21 lits of O2

?→1.87×103 lits

=1.87×10321×100

=8.8889×103 lit of Air.

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