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Problem
1 mol of an organic compound X was found to require 2.5 mol of molecular oxygen for complete combustion. Which of the following could be X? I.
C
2
H
2
\text{C}_2\text{H}_2
C
2
H
2
II.
CH
3
CHO
\text{CH}_3\text{CHO}
CH
3
CHO
III.
C
2
H
5
OH
\text{C}_2\text{H}_5\text{OH}
C
2
H
5
OH
a. I and II only b. I and III only c. II and III only d. I, II and III
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