Alcohols

Question 1

Hydroboration was first reported by? He shared nobel prize with?

Answer 1

HC Brown

Fittig

Question 2

Oxidation after hydroboration is carried out by

Answer 2

H2O2 in presence of H2O2

Question 3

In the reduction of COOH to CH2OH, the reagents are ______ and __________ in the order?

Answer 3

LiAlH4, H2O

Question 4

Carbolic acid is?

Answer 4

Phenol

Question 5

Compare basicity of NaOH and EtONa

Answer 5

EtONa is more basic

Question 6

Phenoxide ion and phenol have ___ number of resonance structures

Answer 6

both 5

Question 7

RDS of dehydration of alcohol

Answer 7

formation of carbocation’

Question 8

Kolbe’s reaction gives

Answer 8

ortho hydroxy benzoic acid

electrophilic substitution

Question 9

In the presence of air, phenols are oxidised into

Answer 9

dark coloured mixtures containing quinones

Question 10

Catalyst for conversion of CO to methanol

Answer 10

ZnO-Cr2O3

Question 11

action of zymase stops when alcohol % reaches

Answer 11

14

Question 12

At higher temperature, alcohols give ___ on H2SO4

Wb lower temperatures

Answer 12

alkenes (443K)

ethers (413K) only primary

Question 13

ether is miscible in water because

Answer 13

H bonds

Question 14

Least reactive functional group

Answer 14

ether

Question 15

Reverse Williamson reactivity order?

Answer 15

HI> HBr> HCl

where formation of carbocation is slow step and addition of I is fast

Question 16

p=bromoanisole percentage

Answer 16

90

Question 17

Trifluoroacetic acid pKa?

Answer 17

0.23

others around 4

Question 18

stronger EWG than NO2?

Answer 18

CF3

Question 19

Ph is ____ EWG than I

Answer 19

weaker

Question 20

Why is diborane preferred for reduction of carboxylic acids

Answer 20

It does not reduce the other functional groups like ester, nitro and halo