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

Which decolourizes the colour of Br3

Question # 2

Which class of compound is more reactive

Question # 3

Free radical mechanism of halogenation of alkanes follow step:

Question # 4

The order of reactivity of halogens in aliphatic substitution reactions is

Question # 5

The benzene molecule contains

Question # 6

Boiling point of n-butane is:

Question # 7

The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule:

Question # 8

Which one of the following gases is used for artificial ripening of fruits

Question # 9

The molecule of ethane possess which hybrization

Question # 10

Replacement of hydrogen by NO2group is called

Question # 11

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

Question # 12

Ethylene combines with water in the presence of H2SO4+ HgSO4and forms

Question # 13

Benzene does not undergo

Question # 14

Meta directing group decreased the ----------- of benzene ring

Question # 15

Alkyl benzenes are readily oxidized by axidfied

Question # 16

Alkanes are least reactive towards:

Question # 17

The reaction-method that does not give an alkane is

Question # 18

Benzene is not prepared from

Question # 19

Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called

Question # 20

Alkenes normally have ______ geometry

Question # 21

In which one of the following compound rings are not fused together at ortho positions

Question # 22

Which of the following decolorized Br2-water

Question # 23

Which compound was recognized the parent member of aromatic compounds

Question # 24

Ethylene can be prepared in the laboratory by heating together ethyl alcohol and

Question # 25

Which is more active ?

Question # 26

Which one of the following gases is used for artificial ripening of fruits ?

Question # 27

The compound prepared by a substitution reaction of benzene is

Question # 28

Aromatic hydrocarbons are the derivatives of

Question # 29

When benzene is burnt in free supply of air, it is completely oxidized to

Question # 30

Vinyl acetylene combines with HCI to form

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ECAT Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1 Benzene does not undergo
A. Substitution reaction
B. Addition reaction
C. Oxidation reaction
D. Elimination reaction
2 The molecule of ethane possess which hybrization
A. sp3
B. sp2
C. sp
D. sp2d
3 A fuel has the same knocking property as a mixture of 70 isooctane (2, 2, 4- trimethyl pentane) and 30% n-heptane by volume the octane number of the fuel is
A. 100
B. 70
C. 50
D. 40
4 acetylene can be converted into-while passing through a Cu-tube at 300°C:
A. Glyoxal
B. Vinyl acetylene
C. Vinyl alcohol
D. Benzene
5 Substituted phenyl groups are called
A. acyl groups
B. phenyl groups
C. Aryl groups
D. Alkyle groups
6 If we remove one hydrogen atom from an alkane we obtain a group called
A. Acetyle group
B. Formyle group
C. Alkyle group
D. Ketyle group
7 Kolb's method has limited synthetic applications due to
A. Expensive catalysis
B. Slow reaction
C. Number of side products produced
D. Salts used are very expensive
8 Which is liquid among the following alkenes?
A. Ethane
B. Propene
C. Butene
D. Pentene
9 Mustard gas is a
A. Gas
B. High boiling speed
C. High melting liquid
D. Steam
10 Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively
A. Zinc dust and soda lime
B. Soda time and zinc dust
C. Zinc dust and sodium hydroxide
D. Soda lime and copper

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