ECAT Pre Engineering Chemistry Chapter 19 MCQ Test With Answer

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

Question # 2

When alkyl is treated with chlorine in the presence of sunlight

Question # 3

the unreactivity of alkanes is based upon

Question # 4

Benzene does not undergo polymerization and it is also resistant to

Question # 5

The Total coal resources of Pakistan are estimated to be

Question # 6

Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to

Question # 7

Which of the following method is most appropriate for the manufacture of methane?

Question # 8

Alkanes are gases :

Question # 9

Which one of following is not monocyclic aromatic hydrocarbon

Question # 10

Alkanes are least reactive towards:

Question # 11

Marsh gas was the name given to

Question # 12

Most common reactions of benzene and its derivatives are

Question # 13

Ethylene polymerizes at 100 atm pressure and 400°C to give

Question # 14

During nitration of benzene, the active nitrating agent is

Question # 15

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

Question # 16

Which of the following substances is used as an antiknock compound?

Question # 17

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

Question # 18

Hybridization of each carbon atom in benzene ring is

Question # 19

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

Question # 20

Vinyl acetylene combines with HCI to form

Question # 21

Alkenes combine readily with electrophillic reagents such as halogens giving

Question # 22

During reaction of O2and alkenes, a product:

Question # 23

Mustard gas is a :

Question # 24

Kolb's method is not useful for the production of

Question # 25

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

Question # 26

Ethylene decolorizes cold dilute solution of KMnO4. This test is known as

Question # 27

A six membered ring containing one double bond called

Question # 28

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

Question # 29

Benzene is obtained from benzene sulphonic acid by treating with

Question # 30

Toluene is also called

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Sr.# Question Answer
1 Alkanes are soluble in all except
A. Benzene
B. Ether
C. Water
D. Carbon tetra chloride
2 Formula of chloroform is
A. CH3CI
B. CCI4
C. CH2CI2
D. CHCI3
3 The presence of a double bond in a compound is the sign of
A. Saturation
B. Unsaturation
C. Substitution
D. None of above
4 Reaction of ethanes with KMnO4 gives:
A. Ozonide
B. Glyoxal
C. Glycol
D. Oxalic acid
5 The treatment of benzene with isobutene in the presence of sulphuric acid give
A. isobutyl benzene
B. tert-Butyl benzene
C. n- Butyl benzene
D. no reaction
6 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
7 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
8 When methane reacts with Cl2in the presence of diffused light the products obtained are
A. Chloroform only
B. Carbon tetrachloride only
C. Chloromethane and dichloromethane
D. Mixture of a, b, c
9 The three alternate single and double bonds in the benzene ring are called
A. Conjugate bonds
B. Resonating bonds
C. Both A and B
D. None of above
10 Which of the following is not an ortho-para directing group
11 Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes
A. 2
B. 1
C. 3
D. 4
12 Complete combustion of alkane yields
A. CO2+ H2O
B. CO2+ heat
C. CO + H2O heat
D. CO2+ H2O + heat
13 When benzene is burnt in free supply of air, it is completely oxidized to
A. CO
B. CO2+H2O
C. H2CO3
D. None
14 The major reaction occurring in the engines of automobiles is
A. Oxidation
B. Reducing
C. Combustion
D. Decomposition
15 Polymerization of ethane take place at pressure of 100 atm and a temperature of
A. 200°C
B. 400°C
C. 600°C
D. 800°C
16 C18and onward hydrocarbons are normally
A. Gases
B. Liquids
C. Solids
D. Plasma
17 Ethylene decolorizes cold dilute solution of KMnO4. This test is known as
A. Colouration test
B. Baeyer's test
C. Silver mirror test
D. Ring test
18 Cyclohexane can be converted not benzene in the presence of
A. Pt at 100°C
B. Pt at 250°C
C. Pd at room temperature
D. Pt at room temperature
19
Question Image
A. 4-methyl pentene
B. 2-methyle-1-butene
C. 2-methyl propane
D. None of the above
20 The nitration of benzene takes place when it is heated with a mixture of conc.HNO3and conc. H2SO4at 50°C in ratio of
A. 1 : 2
B. 1 : 1
C. 1 : 3
D. 2 : 1
21 Alkenes combine readily with electrophillic reagents such as halogens giving
A. Haloalkanes
B. Gem-dihalides
C. Vicinal dihalides
D. Vinyl halides
22 Hybridization in alkanes is:
A. sp
B. sp2
C. sp3
D. dsp2
23 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
24 The simplest and the parent members of aromatic hydrocarbon is
A. Benzene
B. Toluene
C. Biphenyis
D. Naphthalene
25 Toluene is also called
A. Hydroxyl benzene
B. Methyl benzene
C. ethyl benzene
D. None
26 Benzene is obtained by fractional distillation of
A. Heavy oil
B. Anthracene oil
C. Middle oil
D. Light oil
27 CnH2nis the general formula of
A. Alkanes
B. Alkanes
C. alkynes
D. None of above
28 Kolb's method is not useful for the production of
A. Methane
B. Ethane
C. Propane
D. Butane
29 Benzene does not undergo polymerization and it is also resistant to
A. Reduction
B. Oxidation
C. Alkylation
D. Ozonolysis
30 Which is liquid among the following alkenes?
A. Ethane
B. Propene
C. Butene
D. Pentene

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