1
MCQ (Single Correct Answer)

AIPMT 2001

In steam distillation of toluene, the pressure of toluene in vapour is
A
equal to pressure of barometer
B
Less than pressure of barometer
C
equal to vapour pressure of toluene in simple distillation
D
more than vapour pressure of toluene in simple distillation.

Explanation

In steam distillation of toluene, the pressure of toluene in vapour is less than pressure of barometer, because it is carried out when a solid or liquid is insoluble in water and is volatile with steam but the impurities are non-volatile.
2
MCQ (Single Correct Answer)

AIPMT 2001

The incorrect IUPAC name is
A
B
C
D

Explanation

3
MCQ (Single Correct Answer)

AIPMT 2001

Which of the following is incorrect?
A
FeCl3 is used in detection of phenol.
B
Fehling solution is used in detection of glucose
C
Tollen's reagent is used in detection of unsaturation.
D
NaHSO3 is used in detection of carbonyl compound.

Explanation

Tollen's reagent is used to detect aldehydic group. Tollen's reagent is an ammonical solution of silver nitrate. When aldehyde is added to Tollen's reagent, silver oxide is reduced to metallic silver which deposits as mirror.

RCHO + Ag2O $$ \to $$ RCOOH + 2Ag

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