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NEET Prep > Halo > Flashcards

Halo Flashcards

1
Q

Hunsdiecker reaction is a?

A

free radical reaction

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2
Q

The dipole moment of CH3X (where X is a halogen) follows the order

A

CH3Cl > CH3F > CH3Br

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3
Q

If sodium in ethanol is used for the reduction of aldehydes, ketones and esters, the reaction is known as

A

Bouveault-Blanc reduction

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4
Q

Benzoyl derivatives or esters of phenol can be made by reaction of phenol with benzoyl
chloride in presence of 10% NaOH solution. This is known as

A

Schotten-Baumann reaction.

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5
Q

Carbonyl carbon is a Lewis _____, and carbonyl

oxygen, a Lewis ________.

A

acid

base

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6
Q

Stephen reaction halide?

A

SnCl2

alternatively, DIBAl H to convert to imines

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7
Q

Gattermann Koch catalyst

A

AlCl3/CuCl

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8
Q

Nu attacks carbonyl compound from?

A

above

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9
Q

Fehling solution A is aqueous ______ and Fehling solution B is alkaline_______ (Rochelle salt).

A

copper sulphate

sodium potassium tartarate

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10
Q

Carboxyl angle?

A

120

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11
Q

RMgX with CO2

A

carboxylic acid

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12
Q

For amines
C-N-E angle is _____
trimethylamine angle

A

109.5

108

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13
Q

How many Br2 and NaOH in hoffman

A

1 Br2

4NaOH

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14
Q

Carbylamine reaction no. of KOH

A

3KOH

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15
Q

Chloramphenicol used for

A

Typhoid

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16
Q

For alkyl bromide preparation, alcohol is boiled with __% HBr

A

48

17
Q

___% orthophosphoric acid for RI

A

95

18
Q

Who proposed mechanism for SN2 reaction

A

Edward Hughes and Christopher Ingold

19
Q

Relative rates of methyl, ethyl, isopropyl and tert-butyl SN2 reactions

A

30, 1, 0.02, 0

20
Q

Who first observed polarisation in organic

A

Louis Pasteur

21
Q

Who introduced chirality

A

Le Bel and Van’t Hoff

22
Q

bulkier nucleophiles give _________ reactions

A

elimination

due to steric reasons

23
Q

In replacement of chlorine by hydroxyl group, the fast and slow reactions for chloronitrobenzenes

A

slow: addition of -OH to the compound
fast: loss of chlorine

24
Q

Why doesn’t metanitrochlorobenzene have any effect on reaction rate?

A

negative charge does not come to the carbon attached to the nitro group, so there’s no effective EWG effect

25
Q

Reactivity of chlorobenzenes is controlled by the _________ and orientation is controlled by ____

A

stronger inductive effect

resonance effect

26
Q

Chloroform is used in the production of which CFC

A

freon R-22

27
Q

chloroform exposure hurts the liver because

A

it is metabolized to phosgene there

NEET Prep (50 decks)

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