Some Basic Concepts Of Chemistry Question 57

Question: On subjecting 10 mL mixture of N2 and CO to repeated electro spark, 7 mL of O2 was required for combustion. What was the mole percent of CO in the mixture? (All volumes were measured under identical conditions)

Options:

A) 60

B) 40

C) 6

D) 4

Show Answer

Answer:

Correct Answer: A

Solution:

[a] N2a,+O2a,2NO2a,

CO+12O2CO2

(10a)(10a)2 (10a)

a+(10a)2=7

a=4 volume of CO = 6 mL Mole % of CO= 6×10010 =60



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