ICSE Class 10 Chemistry 2014 Solved Paper

Question : 32

Total: 88

Oxygen oxidises ethyne to carbon dioxide and water as shown by the equation :
2C2H2+5O2→4CO2+2H2O
What volume of ethyne gas at s.t.p. is required to produce 8.4dm3 of carbon dioxide at s.t.p. ? [H=1,C=12,O= 16]

Solution:

2C2H2	+	5O2	→	4CO2	+	2H2O
2‌vol.	:	5‌vol.	:	4‌vol.	:	2‌vol.

If 4‌vol . of CO2 is produced by 2 vol. of C2H2 at STP
Then 8.4dm3 of CO2 is produced by
‌

×8.4=4.2dm3‌. ‌

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