1
MCQ (Single Correct Answer)

AIPMT 2002

When phenol is treated with CHCl3 and NaOH, the product formed is
A
benzaldehyde
B
salicylaldehyde
C
salicylic acid
D
benzoic acid.

Explanation

2
MCQ (Single Correct Answer)

AIPMT 2002

n-propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent
A
PCl5
B
reduction
C
oxidation with potassium dichromate
D
ozonolysis.

Explanation

n-propyl alcohol on oxidation with K2Cr2O7 gives an aldehyde which on further oxidation gives an acid.



Isopropyl alcohol on oxidation gives a ketone with the same number of carbon atoms as original alcohol.

3
MCQ (Single Correct Answer)

AIPMT 2001

Which of the following is correct?
A
On reduction, any aldehyde gives secondary alcohol.
B
Reaction of vegetable oil with H2SO4 gives glycerine
C
Alcoholic iodine with NaOH gives iodoform.
D
Sucrose on reaction with NaCl gives invert sugar.

Explanation

C2H5OH + 4I2 + NaOH $$ \to $$

CHI3 + NaI + HCOONa + H2O

Iodoform is a pale yellow solid which crystallises in hexagonal plates.

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