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

The benzene molecule contains

Question # 2

During reaction of O2and alkenes, a product:

Question # 3

Sp3hybird orbitals are oriented at an angle of

Question # 4

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

Question # 5

C18and onward hydrocarbons are normally

Question # 6

Octane number can be changed by

Question # 7

If we remove one hydrogen atom from an alkane we obtain a group called

Question # 8

The major reaction occurring in the engines of automobiles is

Question # 9

Hydrocarbons contain :

Question # 10

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

Question # 11

Substitution of halogen in the benzene ring requires catalyst

Question # 12

Which of the following is an ortho-para directing group

Question # 13

Aromatic hydrocarbons are the derivatives of

Question # 14

Synthetic rubber is made by polymerization of

Question # 15

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

Question # 16

The carbon, carbon bond length in benzene is

Question # 17

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

Question # 18

The geometry of acetylene is

Question # 19

All are ortho & Para directing except

Question # 20

Which gas is used for welding purposes

Question # 21

An organic compound, on treatment with Br2 in CC14 gives bromoderivative of an alkene. The compound will be

Question # 22

A salt producing hydrocarbon among these compounds is

Question # 23

Alkynes are colourless & odouless except

Question # 24

Incomplete oxidation of alkanes yields

Question # 25

Vinyl acetylene combines with HCI to form

Question # 26

Nitroalkane are used in

Question # 27

Sulphuric acid generates nitronium ion by reacting with

Question # 28

Alkenes normally have ______ geometry

Question # 29

The correct order of reactivity of halogens with alkanes is

Question # 30

Which decolourizes the colour of Br3

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ECAT Class Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1 Write the name of following alkene CH2= CH - CH = CH2
A. 1,3 butadiene
B. Butra -1, 3-diene
C. Both a & b
D. None
2 The electron releasing effect of methyl group is significant and it makes ring a good
A. Electrophilic
B. Nucleophilic
C. Nucleophobic
D. Hydrophobic
3 Which of the following decolorized Br2-water
A. Methane
B. Ethane
C. Ethene
D. Propane
4 Kolb's method is not useful for the production of
A. Methane
B. Ethane
C. Propane
D. Butane
5 Which is liquid among the following alkenes?
A. Ethane
B. Propene
C. Butene
D. Pentene
6 The geometry of acetylene is
A. Angular
B. Bent
C. Trigonal
D. Linear
7 Benzene is obtained from benzene sulphonic acid by treating with
A. HCl
B. NaOH
C. H2O
D. NaHCO3
8 Eletronegativity difference in C-C bond in alkanes is:
A. Zero
B. Double
C. Half
D. 4.0
9 Which of the following method is most appropriate for the manufacture of methane?
A. By reduction of CH2CL2
B. Wurtz reaction
C. Liquification of natural gas
D. None of these
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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