Oxygen oxidises ethyne to carbon dioxide and water as shown by the equation : 2 {\C}_2 {\H}_2+5 {\O}_2 \to 4 {\CO}_2+2 {\H}_2 {\O} What volume of ethyne gas at s.t.p. is required to produce 8.4 {\dm}^3 of carbon dioxide at s.t.p. ? [ {\H}=1, {\C}=12, {\O}= 16]

ICSE Class 10 Chemistry 2014 Solved Paper - Question 32

Question : 32 of 88

Marks: +1, -0

Oxygen oxidises ethyne to carbon dioxide and water as shown by the equation :

2 {\C}_2 {\H}_2+5 {\O}_2 → 4 {\CO}_2+2 {\H}_2 {\O}

What volume of ethyne gas at s.t.p. is required to produce

8.4 {\dm}^3

of carbon dioxide at s.t.p. ?

[ {\H}=1, {\C}=12, {\O}=

16]

Solution:

\table 2 {\C}_2 {\H}_2,+,5 {\O}_2, → ,4 {\CO}_2,+,2 {\H}_2 {\O};2 \vol., : ,5 \vol., : ,4 \vol. ,: ,2 \vol.

4 {\vol}

. of

{\CO}_2

is produced by 2 vol. of

{\C}_2 {\H}_2

at STP
Then

8.4 {\dm}^3

{\CO}_2

is produced by

\;{2}/{4} × 8.4=4.2 {\dm}^3 \;\text ". "\;

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