On repeated sparking, `10 mL` of a mixture of carbon monoxide and nitrogen required `7 mL` of oxygen for combustion. What was the volume of nitrogen? (All volumes are measured under identical conditions).

Options

A. `7//2 mL`
B. `4 mL`
C. `7 mL`
D. `17//2 mL`

Answer

B

Explanation

`{:(CO+,(1)/(2)O_(2)rarrCO_(2),N_(2)+,O_(2)rarr2NO),(a,a//2,b,b):}`
`:' a +b = 10`
`(a)/(2) +b = 7`
`:. a= 6` and `b = 4`