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

Kolb's method of alkanes production, is actually

Question # 2

Hybridization of each carbon atom in benzene ring is

Question # 3

Substitution of halogen in the benzene ring requires catalyst

Question # 4

acetylene can be converted into-while passing through a Cu-tube at 300°C:

Question # 5

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

Question # 6

Hydrocarbons contain :

Question # 7

Replacement of hydrogen by NO2group is called

Question # 8

A six membered ring containing one double bond called

Question # 9

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

Question # 10

All C - H bond lengths of benzene ring is

Question # 11

When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reation is known as

Question # 12

Vinyl acetylene combines with HCl to form:

Question # 13

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

Question # 14

Free radical mechanism of halogenation of alkanes follow step:

Question # 15

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

Question # 16

Paraffins are also called

Question # 17

Kolb's method has limited synthetic applications due to

Question # 18

To differentiate isomers we use

Question # 19

Alkanes are least reactive towards:

Question # 20

Alkanes have functional group :

Question # 21

Preparation of vegetable ghee involves

Question # 22

CnH2nis the general formula of

Question # 23

The order of reactivity of halogen acids towards alkenes

Question # 24

Vinyl acetylene combines with HCI to form

Question # 25

Benzene does not undergo polymerization and it is also resistant to

Question # 26

Synthesis rubber is made by polymerization :

Question # 27

Raney - nickel is the alloy of Ni with

Question # 28

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

Question # 29

β-β- dichloroethyle sulphide is commonly known as:

Question # 30

The hydrocarbons having double bonds normally end with suffix

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Sr.# Question Answer
1 Preparation of vegetable ghee involves
A. Halogenations
B. Hydrogenations
C. Hydroxylation
D. Dehydrogenations
2 Which is more active ?
A. Alkanes
B. Alkenes
C. Alkynes
D. Benzene
3 Kolb's method has limited synthetic applications due to
A. Expensive catalysis
B. Slow reaction
C. Number of side products produced
D. Salts used are very expensive
4 Which one of the following gases is used for artificial ripening of fruits
A. Ethene
B. Ethane
C. Methane
D. Propane
5 Which of the following reaction is characteristic of benzene
A. Electrophilic substitution reaction
B. Reduction
C. Oxidation
D. Ozonolysis
6 Alkynes are colourless & odouless except
A. Acetylene
B. Propyne
C. Butyne
D. Pentyne
7 Acetylene is used in the manufacture of
A. Rubber
B. Plastic
C. Ethyle alcohol
D. All of these
8 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
9 Alkyl benzenes are readily oxidized by axidfied
A. KMnO4
B. K2CO3
C. MnO4
D. H2SO4
10 Odour of alkene is:
A. Fruity
B. Odourless
C. Zarlic like
D. Irritating

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