alcohals and phenols

Question 1

alcohols are structural derivatives of

Answer 1

water

Question 2

alcohols having 2 OH groups on adjacent carbons are called

Answer 2

glycols

Question 3

the triol compound is known as

Answer 3

glycerol

Question 4

glycerol is also called

Answer 4

glycerine

Question 5

other names for methanol

Answer 5

wood spirit
carbinol
wood naphtha
Columbian spirit

Question 6

conditions to prepare methanol from CO and hydrogen are

Answer 6

ZnO/ CrO3
450-500 degrees celsius
200 atm

Question 7

other names for ehtanol

Answer 7

alcohol
grain alcohol
methyl carbinol
rectified spirit
absolute alcohol

Question 8

necessary conditions for the fermentation are

Answer 8

aeration
dilution of solution
25-35 degrees Celsius
absence of any preservative

Question 9

ethanol is prepared by the fermentation of

Answer 9

molasses
starch grains
fruit juices

Question 10

formula of molasses is

Answer 10

C12H22O11

Question 11

The enzyme used to convert molasses into glucose and fructose is

Answer 11

invertase

Question 12

the enzyme used to convert glucose in to alcohol is

Answer 12

zymase

Question 13

formula of starch

Answer 13

(C6H10O5)n

Question 14

the reaction of water with starch gives

Answer 14

maltose

Question 15

the formula of maltose is

Answer 15

C12H22O11

Question 16

the enzyme used to convert starch in maltose is

Answer 16

diastase

Question 17

reaction of maltose with water gives

Answer 17

Glucose

Question 18

to convert maltose in glucose the enzyme used is

Answer 18

maltase

Question 19

the alcohol obtained by fermentation is only upto

Answer 19

12-14%

Question 20

rectified spirit is ___% alcohol

Answer 20

95

Question 21

absolute alcohol is obtained by the redistillation of rectified spirit in the presence of _____

Answer 21

CaO(quick lime)

Question 22

The purpose of quick lime during the redistillation of rectified spirit is

Answer 22

to absorb moisture

Question 23

methylated spirit contain _____% methanol

Answer 23

10

Question 24

compounds used for the denaturation of alcohols are

Answer 24

methanol
acetone
pyridine

Question 25

liquid alcohols are

Answer 25

from C1-C12

Question 26

solubility of alcohols

Answer 26

readily soluble in water
solubility decreases gradually

Question 27

the reaction involving C-O bond cleavage in alcohols are

Answer 27

nucleophilic substitution reactions

Question 28

The attacking specie in reactions involving C-O bond cleavage is

Answer 28

Nucleophile

Question 29

reactivity order of alcohols for nucleophilic substitution reaction

Answer 29

Tertiary > secondary > primary > Methanol