Amines

Question 1

Alkaloids contain which functional group

Answer 1

Amines

Question 2

Adrenaline and ephedrine contain

Answer 2

secondary amino group

Question 3

Novocain is used as a

Answer 3

it is a synthetic amino compound, used an anaearthetic in dentistry

Question 4

Benadryl contains

Answer 4

Tertiary amino group, antihistaminic drug

Question 5

Quarternary ammonium salts used as

Answer 5

surfactants

Question 6

S1: Cyano group cannot be introduced by nucleophilic substitution of chlorine in chlorobenzene

S2: Cyanobenzene can be easily obtained from diazonium salt

Answer 6

Both true

Question 7

S1: Cyano group can be introduced by nucleophilic substituiton in chlorobenzene

S2:Cyanobenzene can be easily obtained from diazonium salt

Answer 7

1 wrong
2 true

Question 8

Color of para hydroxy azobenzene

Answer 8

Orange

Question 9

Color of para amino azobenzene

Answer 9

yellow

Question 10

mild reducing agents

Answer 10

hypophosphorous acid (phosphinic acid i.e. H3PO2) and ethanol;
reduce diazonium salts to benzene and themselves become phosphorous acid ( H3PO3 ) and ethanal

Question 11

Yield is better in sandmeyer or gatterman

Answer 11

Sandmeyer ( Cu +1)

Question 12

Benzene diazonium chloride
colour:
structure:
solubility:
stability:
dry state:

Answer 12

colourless
crystalline
soluble in water
stable in cold, reacts with water when warmed
decomposes easily in dry state

Question 12

fluoroboric acid

Answer 12

HBF4

Question 13

If temperature of diazonium salt solution is allowed to rise up to 283 Kelvin the salt becomes

Answer 13

Phenol

Question 14

Benzene diazonium fluoroborate
solubility:
stability:

Answer 14

Water insoluble
Stable at room temperature

Question 15

why is -NHCOCH3 (acetanilide) group less activating than amino group

Answer 15

Lone pair of nitrogen less available to benezene ring by resonance

Question 16

These days, hindsberg is replaced by

Answer 16

P toluene sulphonyl chloride

Question 17

addition of nitrous acid on primary amine

Answer 17

evolution of nitrogen and alchoohl formation, N2 used for quantitave estimation of amino acids and proteins

Question 18

isocyanide / carbyl amine test is given by

Answer 18

aromatic and primary amines only

Question 19

Aniline and arylamines are usually colourless

Answer 19

but get coloured on storage due to atomspheric oxidation

Question 20

boiling point of isomeric amines

Answer 20

1>2>3