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

Physical properties of alkanes increase with increase of all physical constants except

Question # 2

Which of the following is an ortho-para directing group

Question # 3

The electron releasing effect of methyl group is significant and it makes ring a good

Question # 4

All C - H bond lengths of benzene ring is

Question # 5

The addition of HBr is easiest with

Question # 6

Zn + HCI are used in

Question # 7

The treatment of benzene with isobutene in the presence of sulphuric acid give

Question # 8

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

Question # 9

Kolb's method has limited synthetic applications due to

Question # 10

The temp. used for the hydrogenation of alkenes using Ni is

Question # 11

All are ortho & Para directing except

Question # 12

Which decolourizes the colour of Br3

Question # 13

During the preparation of alkynes the active metals that react with tetra halo-alkanes are

Question # 14

When n-hexane is heated in the presence of Pt at 500°C, it cyclists to give

Question # 15

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

Question # 16

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

Question # 17

Which of the following possesses the highest melting point?

Question # 18

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

Question # 19

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

Question # 20

The next homologue of C10H22will be

Question # 21

Synthesis of rubber is made by polymerization of

Question # 22

Benzene is prepared from n-hexane in the presence of catalyst

Question # 23

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

Question # 24

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

Question # 25

The term aromatic was derives from

Question # 26

The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called

Question # 27

Mustard gas is a :

Question # 28

Which of the following decolorized Br2-water

Question # 29

Which one of the following is (m-xylene)

Question # 30

Benzene does not undergo

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ECAT Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1
Question Image
A. Pent -1-ene-3-yne
B. 2-pentyne-4-ene
C. 1-pentene-3-yne
D. Pent-2-yen-4-ene
2 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
3 Which gas is produced by treating CaC2with water
A. Methane
B. Ethane
C. Acetylene
D. HCI
4 Sulphuric acid generates nitronium ion by reacting with
A. Nitric acid
B. Nitrogen gas
C. Nitrous acid
D. Potassium nitrate
5 Octane number can be changed by
A. Isomerisation
B. Alkylation
C. Cyclisation
D. All of these
6 The addition of HBr is easiest with
A. CH2 = CHCl
B. CICH = CHCl
C. CH3 - CH = CH2
D. (CH3)2 C = CH2
7 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
8 Alkynes are colourless & odouless except
A. Acetylene
B. Propyne
C. Butyne
D. Pentyne
9 The hydrocarbon which is used as an illuminating agent
A. Methane
B. Methene
C. Methyne
D. B & C
10 Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
A. Chlorination, nitration, reducing
B. Nitration, chlorination, reducition
C. Nitration, reduction,chlorination
D. Nitration, reduction, acylation, chlorination, hydrolysis

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