ICSE Class 10 Chemistry 2018 Paper

Ethane burns in oxygen to form $\mathrm{CO}_2$ and $\mathrm{H}_2\mathrm{O}$ according to the equation :

2\mathrm{C}_2\mathrm{H}_6+7\mathrm{O}_2 \rightarrow4\mathrm{CO}_2+6\mathrm{H}_2\mathrm{O}.

If 1250 cc of oxygen is burnt with $300\ \mathrm{cc}$ of ethane.
Calculate:

Question : 69 of 80

Marks: +1, -0

the volume of

\mathrm{CO}_2

formed.

Solution:

\begin{array}{c c c c c c c} 2\mathrm{C}_2\mathrm{H}_6 & + & 7\mathrm{O}_2 & \rightarrow & 4\mathrm{CO}_2 & + & 6\mathrm{H}_2\mathrm{O} \\ 2 & : & 7 & : & 4 & & \end{array}

If 2 vol. of

\mathrm{C}_2\mathrm{H}_6

forms 4 vol. of

\mathrm{CO}_2

then

300\,\mathrm{cc}

\mathrm{C}_2\mathrm{H}_6

forms

\;\frac{4}{2} \times 300

=600\,\mathrm{cc}\;\text{ of }\;\mathrm{CO}_2

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