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

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

Question # 2

Complete combustion of alkane yields

Question # 3

How many isomeric disubtituted products are obtained by the introducing of second group in the ring

Question # 4

The geometry of acetylene is

Question # 5

When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product

Question # 6

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

Question # 7

The order of reactivity of halogen acids towards alkenes

Question # 8

Alkanes are soluble in all except

Question # 9

The presence of a double bond in a compound in the sign of:

Question # 10

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

Question # 11

Paraffins are also called

Question # 12

When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reation is known as

Question # 13

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

Question # 14

Hybridization in alkanes is:

Question # 15

The hydrocarbon used for polymerization is

Question # 16

Which one does not declourized KMnO4

Question # 17

Acetylene is used in the manufacture of

Question # 18

Octane number can be changed by

Question # 19

Write the name of following compound

Question # 20

During reaction of O2and alkenes, a product:

Question # 21

A salt producing hydrocarbon among these compounds is

Question # 22

Which one of the following is (m-xylene)

Question # 23

The hydrocarbon which is used as an illuminating agent

Question # 24

How many molecules of chlorine adds in benzene in the presence of sunlight

Question # 25

Which gas is used for welding purposes

Question # 26

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

Question # 27

The stability of acromatic compounds decreases with ------- in the no. of its resonance structure

Question # 28

Which is more active ?

Question # 29

Alkyl benzenes are readily oxidized by axidfied

Question # 30

The order of reactivity of halogens in aliphatic substitution reactions is

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ECAT Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1 Meta directing group decreased the ----------- of benzene ring
A. Physical activity
B. Chemical reactivity
C. Density
D. None
2 The general formula of alkane is
A. CnH2n+2
B. CnHn
C. CnH2n
D. C2H2n-1
3 Formula of chloroform is:
A. CH3Cl
B. CCl4
C. CH2Cl2
D. CHCl3
4 Which one of the following gases is used for artificial ripening of fruits
A. Ethene
B. Ethane
C. Methane
D. Propane
5 The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule:
A. Hund's rule
B. Markownikov's rule
C. Pauli's Exclusion Principle
D. Auf bau Principle
6 The stability of acromatic compounds decreases with ------- in the no. of its resonance structure
A. Decrease
B. Increase
C. Remain constant
D. Partially decreases
7 During nitration of benzene, the active nitrating agent is
A. NO3
B. NO2+
C. NO2-
D. HNO3
8 CnH2nis the general formula of
A. Alkanes
B. Alkanes
C. alkynes
D. None of above
9 Hybridization of each carbon atom in benzene ring is
A. sp hybridized
B. sp2hybridized
C. sp3
D. dsp2
10 Hydrocarbons are organic compounds which contain elements such as
A. Hydrogen
B. Carbon
C. Hydrogen and carbon
D. Halogens

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