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01. 2-Phenyl-2-propene on acetic hydration gives

a) 2-phenyl-2-propanol

b) 2-phenyl-1-propanol

c) 3-phenyl-2-propanol

d) 1-phenyl-2-propanol

Ans:a

02.

is rotated anticlockwise about bond. The resulting conformer is

a) Partially eclipsed

b) Eclipsed

c) Gauche

d) Staggered

Ans:c
The resulting conformer is a Gauche conform

03. Benzamide on treatment with gives

a) Aniline b) Benzonitrile

c) Chlorobenzene d) Benzyl amine

Ans:b
is dehydrating agent

04. The methods chiefly used the extortion on Lead & Tin from their ores are respectively

a) Self reduction & carbon reduction

b) Self reduction & electrolytic reduction

c) Carbon reduction & self reduction

d) Cyanide process & carbon reduction

Ans:a  Fractual

05. Product on monobromin ation of this compounds.

a)

 

 


b)

c)

d)

Ans: b. The ring with maximum electron density will be substituted by an electrophile

The ring attached with —NH- will have rich electron density due to resonance. As otho position is blocked, the electrophile attacks the para position

06. The order or reactivity of phenyl Magnesium Bromide with following compounds

i) ii)

iii)

a) ii > iii > i b) i > iii > ii

c) ii > i> iii

d) All react with the same rate


Ans:c. 
Nucleophile attacks the most electrophile site first. Among aldehyde and a ketone, aldehydes are more electrophilic as in ketones the charge an carbonyl carbon is decreased by effect of both alkyl groups

More over in the tetrahedral intermediate aldehydes have less steric repulsion than ketone and aldehydes increases the -ve charge on oxygen less in comparison to ketones

Based on the above the order of reactivity is

 

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