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Q.

The volume in litres of  CO2 liberated at STP, when 10g of 90% pure limestone is heated completely is

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a

2.24

b

2.016

c

20.16

d

22.4

answer is A.

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Detailed Solution

10 gms of 90% pure lime stones means  90100×1.0

= 9 gms of pure  CaCO3

CaCO3CaO+CO2

100 gms       22.4 lit at STP

9 gms           X lit at STP

 volume of CO2=9×22.4100 lit at STP

= 2.016 lit at STP

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