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

Reaction of ethanes with KMnO4 gives:

Question # 2

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

Question # 3

Benzene does not undergo

Question # 4

Mustard gas is a

Question # 5

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

Question # 6

The sp2hybird orbitals are oriented in space at one angle

Question # 7

Vinyl acetylene combines with HCl to form:

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

A six membered ring containing one double bond called

Question # 13

What is not a common use of methane

Question # 14

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

Question # 15

Which compound was recognized the parent member of aromatic compounds

Question # 16

Hydrocarbons are organic compounds which contain elements such as

Question # 17

The order of reactivity of halogen acids towards alkenes

Question # 18

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

Question # 19

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

Question # 20

Which one of the following is (m-xylene)

Question # 21

Preparation of vegetable ghee involves

Question # 22

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

Question # 23

In CH4, all the H-C-H bond angles are

Question # 24

Which of the following reaction is characteristic of benzene

Question # 25

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

Question # 26

All C - H bond lengths of benzene ring is

Question # 27

Which is the used as test for the presence of alkenes

Question # 28

The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is

Question # 29

In Friedal-Craft's alkylation besides AlCl3 the other reactants are

Question # 30

Which is more active ?

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ECAT Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1 During the preparation of alkynes the active metals that react with tetra halo-alkanes are
A. Zn
B. Mg
C. Both a and b
D. None
2 Ethylene polymerizes at 100 atm pressure and 400°C to give
A. Polybenzene
B. Polyalcohol
C. Polypropylene
D. Polyethylene
3 Synthetic rubber is made by polymerization of
A. Chloroform
B. Acetylene
C. Divinlacetylene
D. Butene
4 Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to
A. Alkynes
B. Alkenes
C. Alkanes
D. Alcohol
5 Incomplete oxidation of alkanes yields
A. CO2& carbon black
B. CO2+ heat
C. CO and carbon black
D. CO + heat
6 Alkynes are colourless & odouless except
A. Acetylene
B. Propyne
C. Butyne
D. Pentyne
7 C18and onward hydrocarbons are normally
A. Gases
B. Liquids
C. Solids
D. Plasma
8 Benzene is prepared from n-hexane in the presence of catalyst
A. Cr2O3
B. Al2O3
C. SiO2
D. All above
9 Hybridization in alkanes is:
A. sp
B. sp2
C. sp3
D. dsp2
10 The nitration of benzene takes place when it is heated with a mixture of conc.HNO3and conc. H2SO4at 50°C in ratio of
A. 1 : 2
B. 1 : 1
C. 1 : 3
D. 2 : 1

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