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

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

Question # 2

The reaction-method that does not give an alkane is

Question # 3

Acetylene when treated with 10% H2SO4in the presence of HgSO4adds one molecule of water to form

Question # 4

Acetylene is used in the manufacture of

Question # 5

β-β- dichloroethyle sulphide is commonly known as:

Question # 6

The reaction in which ketone is reduced to the alkane is called

Question # 7

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

Question # 8

Boiling point of n-butane is:

Question # 9

Most common reactions of benzene and its derivatives are

Question # 10

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

Question # 11

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

Question # 12

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

Question # 13

The empirical formula of benzene is determined by

Question # 14

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

Question # 15

Alkanes are generally not reactive towards acids, alkalis, oxidation or reuducing agents. They however undergo some reactions, which one is the reaction undergone by alkanes

Question # 16

Which is symmetric alkene?

Question # 17

Which one gives acidic reactions?

Question # 18

Toluene is also called

Question # 19

All C - H bond lengths of benzene ring is

Question # 20

Which of the following acid can be used as a catalyst in Friedal Craft's reactions

Question # 21

"Each different compound should have a different name" was published by IUPAC system of nomenclature in

Question # 22

Octane number can be changed by

Question # 23

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

Question # 24

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

Question # 25

Which compound was recognized the parent member of aromatic compounds

Question # 26

The compound prepared by a substitution reaction of benzene is

Question # 27

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

Question # 28

To differentiate isomers we use

Question # 29

Which reaction is too vigorous to control

Question # 30

The general formula of alkane is

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Sr.# Question Answer
1 Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes
A. 2
B. 1
C. 3
D. 4
2 How many isomeric disubtituted products are obtained by the introducing of second group in the ring
A. Two
B. Three
C. Four
D. None
3 Alkene general formula :
A. CnH2n+2
B. CnH2n
C. CnH2n-2
D. CnH2n+1
4 Benzene is obtained from benzene sulphonic acid by treating with
A. HCl
B. NaOH
C. H2O
D. NaHCO3
5 Toluene is also called
A. Hydroxyl benzene
B. Methyl benzene
C. ethyl benzene
D. None
6 The stability of acromatic compounds decreases with ------- in the no. of its resonance structure
A. Decrease
B. Increase
C. Remain constant
D. Partially decreases
7 Catalytic oxidation of alkanes is used for the preparation of
A. Adehydes
B. Ketones
C. Fatty acid
D. Carbonyylic acids
8 Which of the following is not an ortho-para directing group
9 Alkanes are least reactive towards:
A. Acids and bases
B. Reducing agents
C. Oxidizing agents
D. All of these
10 Benzene reacts with ozone and gives
A. Glycerin
B. Glyoxal
C. Maleic anhydride
D. Benzoic acid

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