Question

3 gm of carbon reacts completely with 5 gm of oxygen. What will be the % of CO in the product?

• A. 75%
  
• B. 25%
  
• C. 100%
  
• D. 50%

Answer 1

The correct option is A

75%

$C+O_2\to CO+C{O}_{2}POACforC1\times nc=1\times n_{CO}+1\times n_{C{O}_2}\frac{3}{12}=a+b.......\left(1\right)POACforO2\times n_{O_2}=1\times n_{CO}+2\times n_{C{O}_2}2\times \frac{5}{32}=a+2b.......\left(2\right)Onsolving:a=\frac{3}{16},b=\frac{1}{16}$
% of CO= $\frac{\frac{3}{16}}{\frac{3}{12}}\times 100=75$%