Question

$200cc$ of acetylene is formed form a certain mass of calcium carbide. Find the volume of oxygen required and carbon dioxide formed during its complete combustion. The combustion reaction can be represented as:

$2C_2{H}_2\left(g\right)+5O_2\left(g\right)\to 4C{O}_2\left(g\right)+2H_{2}O\left(g\right)$.

• A. 500 cc, 400 cc
• B. 600 cc, 400 cc
• C. 600 cc, 500 cc
• D. 700 cc, 500 cc

Answer 1

The correct option is A 500 cc, 400 cc

2 moles of acetylene reacts with 5 moles of oxygen to form 4 moles of carbon dioxide and 2 moles water.

$2C_2{H}_2\left(g\right)+5O_2\left(g\right)\to 4C{O}_2\left(g\right)+2H_{2}O\left(g\right)$
2 vol 5 vol 4 vol
200 cc 500 cc 400 cc

Therefore, the volume of oxygen required is 500 cc and $C{O}_2$ formed is 400 cc.

Hence, option $A$ is correct.