Chemistry Chapter 8 Alcohols Objective type Questions and Answers PDF

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Summary

INTRODUCTION
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....

Description

Chemistry Alcohols

1.

Monohydric alcohols contain hydroxyl groups _____ (a) (c)

2.

(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.

monohydric alcohol trihydric alcohol

Ethyl alcohol is a _______ (a) (c)

5.

2 0

An example of a trihydric alcohol is ______ (a) (c)

4.

(b) (d)

Ethylene glycol is an example of ______ (a) (c)

3.

1 3

isopropyl alcohol propan – 2 – ol

(b) (d)

butan – 2 – ol 2 methyl propan – 1 – ol

CH2CH3  CH3 CH.CH3 (A); CH3 CH2 CH2 OH (B); CH3  C  OH (C) |  OH CH3 For A , B, C the correct statement is ________ (a) all are primary alcohols (b) A and B are primary alcohols and C is a secondary alcohol (c) A is primary, B is secondary and C is a tertiary alcohol (d) A is secondary, B is primary and C is tertiary alcohol

7.

Molasses contain ________ (a) (b) (c) (d)

8.

‘Wash’ is the _____ (a) (b) (c) (d)

9.

(b) (d)

98% pure 85% pure

100% pure 98% pure

(b) (d)

95.5% pure 95.8% pure

(b) (d)

red violet

Denatured alcohol contains _______ (a) (b) (c) (d)

13.

95% pure 100% pure

Absolute alcohol is _____ (a) (c)

12.

rectified spirit methylated spirit lime alcohol absolute alcohol

Rectified spirit is mixed with lime and then distilled. The alcohol obtained is ___ (a) (c)

11.

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.

50 – 50% of sucrose, glucose and fructose 60 % of sucrose & fructose 70% of fructose 60% of sucrose

Rectified spirit, methanol, pyridine Rectified spirit, water Methyl alcohol, water, pyridine Rectified spirit, lime, water.

Ethanol burns in air with a _____ flame. (a) (c)

blue green

14.

15.

Esterification is a reaction between ________ (a)

an acid and a base

(c)

an alcohol and an acid

(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. (a) (c)

20.

H2 CO2

CH3COOH + C2H5OH (a) (c)

19.

(b) Methylated spirit (d) absolute alcohol

When phophorus pentachloride is added to ethyl alcohol, the gas produced is ___ (a) (c)

18.

Rectified spirit Power alcohol

When a piece of sodium metal is added to ethanol, the gas evolved is ________ (a) (c)

17.

an oxidizing agent and a reducing agent (d) an alcohol and an oxidizing agent

Which alcohol is used as a fuel? (a) (c)

16.

(b)

Primary tertiary

(b) (d)

Secondary glycol

Alcohol used as an antifreeze for automobiles __________ (a) (c)

methanol Power alcohol

(b) (d)

ethanol propyl alcohol

21.

Methylated spirit is called as _____ (a) (c)

22.

methyl alcohol + ethyl alcohol ethanol + ether

Denature spirit Wood spirit

(b) (d)

Metylated spirit Rectified spirit

zymase both (a) & (b)

(b) (d)

invertase none

non - conductor semi conductor

(b) (d)

conductor insulator

Denatured alcohol contains _________ methanol. (a) (c)

27.

(b) (d)

Alcohols is a _____ (a) (c)

26.

methyl alcohol + petrol ethyl alcohol + petrol

The enzyme used to convert Glucose to C2H5OH is _______ (a) (c)

25.

wood spirit power alcohol

Methanol is also called as________ (a) (c)

24.

(b) (d)

Power alcohol is ____ (a) (c)

23.

rectified spirit denatured alcohol

5% 25%

(b) (d)

0.5% 15%

(b) (d)

R – OH R – CHO

The general formula for alcohol is _____ (a) (c)

R–O–R R – COOH

28.

An example for secondary alcohol is _______ (a) (c)

29.

(b) (d)

antipyretic none

95.5% 98.5%

(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. (a) (c)

33.

antiseptic anaesthetic

2 – methyl propan – 2 – ol is an example for ______ (a) (c)

32.

propan – 2 – ol butan – 2 – ol

Rectified spirit consists of ______ of alcohol. (a) (c)

31.

(b) (d)

Ethanol is used as an ________ (a) (c)

30.

propan – l – ol butan – 1 – ol

Ammonium sulpahte both (a) (or) (b)

Butan – 2 – ol is a _______ (a) (c)

Primary alcohol Tertiary alcohol...