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Title: Alcohols Objective type Questions and Answers
Description: When one or more hydrogen atoms in an aliphatic hydrocarbon are replaced by one or more hydroxyl (OH) groups, the resulting compounds are known as alcohols. According to the number of the hydroxyl groups present in them, they are known as monohydric, dihydric, trihydric or polyhydric alcohols. In case of polyhydric alcohols (having more than one OH group), the hydroxyl groups are always present on different carbon atoms. It is because the alcohols having two or more OH groups attached to the same carbon are unstable.
Description: When one or more hydrogen atoms in an aliphatic hydrocarbon are replaced by one or more hydroxyl (OH) groups, the resulting compounds are known as alcohols. According to the number of the hydroxyl groups present in them, they are known as monohydric, dihydric, trihydric or polyhydric alcohols. In case of polyhydric alcohols (having more than one OH group), the hydroxyl groups are always present on different carbon atoms. It is because the alcohols having two or more OH groups attached to the same carbon are unstable.
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Chemistry
Alcohols
1
...
(b)
(d)
dihydric alcohol
ether
ethanol
propanol
(b)
(d)
ethylene glycol
glycerol
Primary alcohol
Tertiary alcohol
(b)
(d)
Secondary alcohol
Dihydric alcohol
Which of the following is not a secondary alcohol?
(a)
(c)
6
...
2
0
An example of a trihydric alcohol is ______
(a)
(c)
4
...
1
3
isopropyl alcohol
propan – 2 – ol
(b)
(d)
butan – 2 – ol
2 methyl propan – 1 – ol
CH2CH3
CH3 CH
...
Molasses contain ________
(a)
(b)
(c)
(d)
8
...
(b)
(d)
98% pure
85% pure
100% pure
98% pure
(b)
(d)
95
...
8% pure
(b)
(d)
red
violet
Denatured alcohol contains _______
(a)
(b)
(c)
(d)
13
...
rectified spirit
methylated spirit
lime alcohol
absolute alcohol
Rectified spirit is mixed with lime and then distilled
...
enzyme used in fermentation
filtrate of the fermented liqid containing about 10% ethanol
a dilute solution of cane sugar
lime alcohol
Fractional distillation of fermented liquid gives_____
(a)
(b)
(c)
(d)
10
...
Ethanol burns in air with a _____ flame
...
15
...
(b)
(d)
O2
CO
Cl2
HCl
Ethly acetate
ethy propionate
(b)
(d)
cone
H2SO4
H2
PH3
The ester formed in this reaction is _____
(b)
(d)
methyl propionate
methyl acetate
Isobutyl alcohol is an example for _____ alcohol
...
H2
CO2
CH3COOH + C2H5OH
(a)
(c)
19
...
Rectified spirit
Power alcohol
When a piece of sodium metal is added to ethanol, the gas evolved is ________
(a)
(c)
17
...
Methylated spirit is called as _____
(a)
(c)
22
...
(a)
(c)
27
...
methyl alcohol + petrol
ethyl alcohol + petrol
The enzyme used to convert Glucose to C2H5OH is _______
(a)
(c)
25
...
(b)
(d)
Power alcohol is ____
(a)
(c)
23
...
5%
15%
(b)
(d)
R – OH
R – CHO
The general formula for alcohol is _____
(a)
(c)
R–O–R
R – COOH
28
...
(b)
(d)
antipyretic
none
95
...
5%
(b)
(d)
95%
98%
Primary alcohol
Tertiary alcohol
(b)
(d)
Secondary alcohol
none
(b)
(d)
Ammonium phosphate
none
(b)
(d)
Secondary alcohol
Aldehyde
_______ is / are added as a food for yeast
...
antiseptic
anaesthetic
2 – methyl propan – 2 – ol is an example for ______
(a)
(c)
32
...
(a)
(c)
31
...
propan – l – ol
butan – 1 – ol
Ammonium sulpahte
both (a) (or) (b)
Butan – 2 – ol is a _______
(a)
(c)
Primary alcohol
Tertiary alcohol
Title: Alcohols Objective type Questions and Answers
Description: When one or more hydrogen atoms in an aliphatic hydrocarbon are replaced by one or more hydroxyl (OH) groups, the resulting compounds are known as alcohols. According to the number of the hydroxyl groups present in them, they are known as monohydric, dihydric, trihydric or polyhydric alcohols. In case of polyhydric alcohols (having more than one OH group), the hydroxyl groups are always present on different carbon atoms. It is because the alcohols having two or more OH groups attached to the same carbon are unstable.
Description: When one or more hydrogen atoms in an aliphatic hydrocarbon are replaced by one or more hydroxyl (OH) groups, the resulting compounds are known as alcohols. According to the number of the hydroxyl groups present in them, they are known as monohydric, dihydric, trihydric or polyhydric alcohols. In case of polyhydric alcohols (having more than one OH group), the hydroxyl groups are always present on different carbon atoms. It is because the alcohols having two or more OH groups attached to the same carbon are unstable.