Q. An organic compound A containing C, H and O has a pleasant odour with boiling point of 78$℃$. On boiling A with concentrated${\ H}_{2}SO_{4}$, a colourless gas is produced which decolourises bromine water and alkaline $KMnO_{4}$. The organic liquid A is
A) $C_{2}H_{5}Cl$
B) $C_{2}H_{5}COOCH_{3}$
C) $C_{2}H_{5}OH$
D) $C_{2}H_{6}$
Explanation
(c)
The organic liquid A is $C_{2}H_{5}OH$
Ethyl alcohol is a colourless liquid with a characteristic pleasant smell, having boiling point $78.1℃.$
$C_{2}H_{5}OH\overset{Conc.H_{2}SO_{4}}{\rightarrow}CH_{2} = CH_{2}$
(which decolourises $Br_{2}$ water and alk. $KMnO_{4}$)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.