ECAT Pre Engineering Chemistry Chapter 19 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons

Try The MCQ's Test For ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons

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ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons

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Question # 1

The empirical formula of benzene is determined by

Question # 2

All C - H bond lengths of benzene ring is

Question # 3

Benzene is obtained by fractional distillation of

Question # 4

Synthetic rubber is made by polymerization of

Question # 5

In Friedal-Craft's alkylation besides AlCl3 the other reactants are

Question # 6

What is not a common use of methane

Question # 7

Benzene is obtained from benzene sulphonic acid by treating with

Question # 8

An alkane is produced when an alkyle halide reacts with zinc in the presence of

Question # 9

Alkanes are generally not reactive towards acids, alkalis, oxidation or reuducing agents. They however undergo some reactions, which one is the reaction undergone by alkanes

Question # 10

Which of the following is not an electrophitic substitution reaction of benzene

Question # 11

To differentiate isomers we use

Question # 12

Which reaction is too vigorous to control

Question # 13

Amongst the following the compound that can be most readily sulphonated is

Question # 14

The nitration of benzene takes place when it is heated with a mixture of conc.HNO3and conc. H2SO4at 50°C in ratio of

Question # 15

The correct order of reactivity of halogens with alkanes is

Question # 16

Which gas is used for welding purposes

Question # 17

Which can be used for dehydration of alcohol

Question # 18

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

Question # 19

Which of the following acid can be used as a catalyst in Friedal Craft's reactions

Question # 20

Which is more active ?

Question # 21

Hybridization in alkanes is:

Question # 22

The electrophile in aromatic sulphonation is

Question # 23

Which of the following is not aromatic hydrogencarbon

Question # 24

Preparation of vegetable ghee involves:

Question # 25

Which one of following is not monocyclic aromatic hydrocarbon

Question # 26

The order of dehydration of alcohol

Question # 27

Benzene is not prepared from

Question # 28

Sp3hybird orbitals are oriented at an angle of

Question # 29

The term aromatic was derives from

Question # 30

The elimination of HX from adjacent carbon atoms is called

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ECAT Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1 The order of dehydration of alcohol
A. 10> 20> 30
B. 10> 30> 20
C. 20> 30> 10
D. 30> 20> 10
2 For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to
A. Hydrolysis
B. Oxidation
C. Hydrogenation
D. Electrolysis
3 Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes
A. 2
B. 1
C. 3
D. 4
4 the unreactivity of alkanes is based upon
A. Inertness of sigma bond
B. Non-polarity of the bonds
C. Both A and B
D. None of above
5 The electron releasing effect of methyl group is significant and it makes ring a good
A. Electrophilic
B. Nucleophilic
C. Nucleophobic
D. Hydrophobic
6 During the preparation of alkynes the active metals that react with tetra halo-alkanes are
A. Zn
B. Mg
C. Both a and b
D. None
7 Sp3hybird orbitals are oriented at an angle of
A. 107.5°
B. 108.5°
C. 109.5°
D. 103.5°
8 What is not a common use of methane
A. As a fuel
B. For the preparation of haloaklanes
C. For the preparation of methyl alcohol
D. For the preparation of sulphuric acid
9 The order of reactivity of halogens in aliphatic substitution reactions is
A. Br2 > C12 > F2
B. C12 > Br2 > F2
C. C12 C12 > Br2
D. F2 > Br2 > C12
10 Benzene was discovered by Michael Faraday's in
A. 1824
B. 1825
C. 1826
D. 1827

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