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 is obtained by fractional distillation of

Question # 2

Which one gives acidic reactions?

Question # 3

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

Question # 4

An alkynes having Carbon count of 20 is

Question # 5

Which one of following is not monocyclic aromatic hydrocarbon

Question # 6

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

Question # 7

Alkenes combine readily with electrophillic reagents such as halogens giving

Question # 8

Which one of the following is (m-xylene)

Question # 9

In CH4, all the H-C-H bond angles are

Question # 10

Eletronegativity difference in C-C bond in alkanes is:

Question # 11

The Total coal resources of Pakistan are estimated to be

Question # 12

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

Question # 13

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

Question # 14

When methane reacts with Cl2in the presence of diffused light the products obtained are?

Question # 15

What is not a common use of methane

Question # 16

Synthesis rubber is made by polymerization :

Question # 17

Which of the following reaction is characteristic of benzene

Question # 18

The hydrocarbon which is used as an illuminating agent

Question # 19

De halogenatiion of tetrahalides happens in the presence of active metal like

Question # 20

The term aromatic was derives from

Question # 21

Formula of chloroform is:

Question # 22

Alkynes are colourless & odouless except

Question # 23

The C-C bond angles in benzene ring are

Question # 24

The three alternate single and double bonds in the benzene ring are called

Question # 25

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

Question # 26

Write the name of following alkene CH2= CH - CH = CH2

Question # 27

Vinyl acetylene combines with HCl to form:

Question # 28

The alkynides are used for the ----------- of alkynes

Question # 29

The sp2hybird orbitals are oriented in space at one angle

Question # 30

Hydrogenation of alkenes/alkynes inthe presence of Ni as catalyst at 3000°C result in the formation of corresponding alkanes. This reaction is known as

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ECAT Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1 Octane number is zero for
A. n-Heptane
B. Isooctane
C. n-Hexane
D. Isoheptane
2 Benzene is prepared from n-hexane in the presence of catalyst
A. Cr2O3
B. Al2O3
C. SiO2
D. All above
3 When n-hexane is heated in the presence of Pt at 500°C, it cyclists to give
A. Benzene
B. Cyclohexene
C. Benzene
D. Toluene
4 Alkanes are gases :
A. C1-C4
B. C5-C10
C. C11-C15
D. C10-C20
5 Preparation of vegetable ghee involves:
A. Halogenation
B. Hydrogenation
C. Hydroxylation
D. Dehydrogenation
6 The reaction in which ketone is reduced to the alkane is called
A. Kolb
B. Clemmensen
C. Cannizzaro
D. None
7 Sp3hybird orbitals are oriented at an angle of
A. 107.5°
B. 108.5°
C. 109.5°
D. 103.5°
8 The reaction-method that does not give an alkane is
A. Catalytic hydrogenation of alkanes
B. Wurtz reaction
C. Hydrolysis of alkyl magnesium bromide
D. Dehydrohalogenation of an alkyl halide
9 "Each different compound should have a different name" was published by IUPAC system of nomenclature in
A. 1892
B. 1830
C. 1947
D. 1979
10 An organic compound, on treatment with Br2 in CC14 gives bromoderivative of an alkene. The compound will be
A. CH3 - CH = Ch2
B. CH3CH = CHCH3
C. HC = CH
D. H2C = CH2

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