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

Question # 2

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

Question # 3

The hydrocarbons having double bonds normally end with suffix

Question # 4

Ethylene combines with water in the presence of H2SO4+ HgSO4and forms

Question # 5

The saturated hydrocarbons usually end with suffix ______

Question # 6

The simplest and the parent members of aromatic hydrocarbon is

Question # 7

Which one of following is not monocyclic aromatic hydrocarbon

Question # 8

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

Question # 9

Which of the following is not aromatic hydrogencarbon

Question # 10

Hydrocarbons are organic compounds which contain elements such as

Question # 11

Alkenes combine readily with electrophillic reagents such as halogens giving

Question # 12

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

Question # 13

Octane number is zero for

Question # 14

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

Question # 15

In which one of the following compound rings are not fused together at ortho positions

Question # 16

Acetylene gives

Question # 17

Preparation of vegetable ghee involves:

Question # 18

C18and onward hydrocarbons are normally

Question # 19

Mustard gas is a :

Question # 20

Aromatic hydrocarbons are the derivatives of

Question # 21

All C - H bond lengths of benzene ring is

Question # 22

When acetylene is passed through a copper tube at 300°C, it polymerizes to

Question # 23

The order of reactivity of halogen acids towards alkenes

Question # 24

Which of the following is not an ortho-para directing group

Question # 25

Which of the following possesses the highest melting point?

Question # 26

Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon

Question # 27

The empirical formula of benzene is determined by

Question # 28

Benzene is obtained from benzene sulphonic acid by treating with

Question # 29

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

Question # 30

Vinyl acetylene combines with HCI to form

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ECAT Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1 The order of dehydration of alcohol
A. 10> 20> 30
B. 10> 30> 20
C. 20> 30> 10
D. 30> 20> 10
2 Alkanes are gases :
A. C1-C4
B. C5-C10
C. C11-C15
D. C10-C20
3 The method involved for electrolysis of Na or K salts of carboxylic acids
A. Sabatier's sendrens reaction
B. Kolbe's method
C. Clemmensen
D. Wolf kishner reduction
4 Odour of alkene is:
A. Fruity
B. Odourless
C. Zarlic like
D. Irritating
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 Benzene does not undergo polymerization and it is also resistant to
A. Reduction
B. Oxidation
C. Alkylation
D. Ozonolysis
7 Alkynes are colourless & odouless except
A. Acetylene
B. Propyne
C. Butyne
D. Pentyne
8
Question Image
A. Pent -1-ene-3-yne
B. 2-pentyne-4-ene
C. 1-pentene-3-yne
D. Pent-2-yen-4-ene
9 The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule
A. Hund's rule
B. Markowvikov's rule
C. Pauli's exclusion principle
D. Auf ban principle
10 What is not a common use of methane
A. As a fuel
B. For the preparation of haloaklanes
C. For the preparation of methyl alcohol
D. For the preparation of sulphuric acid

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