1
MCQ (Single Correct Answer)

AIPMT 2010 Prelims

Which of the following compounds has the most acidic nature?
A
B
C
D

Explanation

Phenol is most acidic among the given options. In phenol, the electron withdrawing phenyl ring polarises the O-H bond thereby facilitating the release of H+.

In option (A) the -I effect of phenyl ring is diminished by -CH2 group.

Moreover, the phenolate ion is stabilised by resonance.
2
MCQ (Single Correct Answer)

AIPMT 2010 Mains

Match the compounds given in List I with their characteristic reactions given in List II. Select the correct option.

List I
(Compounds)
List II
(Reactions)
A. CH3(CH2)3NH2 (i) Alkaline hydrolysis
B. CH3C$$ \equiv $$CH (ii) With KOH (alcohol)
and CHCl3 produces
bad smell
C. CH3CH2COOCH3 (iii) Gives white ppt.
with ammoniacal
AgNO3
D. CH3CH(OH)CH3 (iv) With Lucas reagent
cloudiness appears
after 5 minutes
A
A-(ii),  B-(i),  C-(iv),  D-(iii)
B
A-(iii),  B-(ii),  C-(i),  D-(iv)
C
A-(ii),  B-(iii),  C-(i),  D-(iv)
D
A-(iv),  B-(ii),  C-(iii),  D-(i)

Explanation

3
MCQ (Single Correct Answer)

AIPMT 2010 Mains

When glycerol is treated with excess of HI, it produces
A
2-iodopropane
B
allyl iodide
C
propene
D
glycerol triiodide

Explanation

Glycerol when treated with excess HI produces 2–iodopropane.

4
MCQ (Single Correct Answer)

AIPMT 2010 Mains

Following compounds are given


Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform?
A
(i), (iii) and (iv)
B
Only (ii)
C
(i), (ii) and (iii)
D
(i) and (ii)

Explanation

The iodoform test is exhibited by ethyl alcohol, acetaldehyde, acetone, methyl ketones, those alcohols which possess
CH3CH(OH)— group, acetophenone, $$\alpha $$-hydroxypropionic acid, keto acid, 2-aminoalkanes, etc.

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