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

Octane number can be changed by

Question # 2

Which is liquid among the following alkenes?

Question # 3

The saturated hydrocarbons usually end with suffix ______

Question # 4

Which one of the following gases is used for artificial ripening of fruits

Question # 5

The major reaction occurring in the engines of automobiles is

Question # 6

The four bonds of carbon in methane are directed towards the corners of

Question # 7

Question Image
Question # 8

Acetylene gives

Question # 9

Which is the used as test for the presence of alkenes

Question # 10

Mustard gas is a

Question # 11

The difference between amount of heat actually released and that of calculated is called

Question # 12

The hydrocarbon which is used as an illuminating agent

Question # 13

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

Question # 14

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

Question # 15

Which one of the following gases is used for artificial ripening of fruits

Question # 16

Zn + HCI are used in

Question # 17

Vinyl acetylene combines with HCI to form

Question # 18

The method used only for the production of symmetrical alkanes

Question # 19

Alkanes have functional group :

Question # 20

Which of the following species participate in sulphonation of benzene ring?

Question # 21

The empirical formula of benzene is determined by

Question # 22

CnH2nis the general formula of

Question # 23

Paraffins are also called

Question # 24

Substitution of halogen in the benzene ring requires catalyst

Question # 25

Benzene does not undergo

Question # 26

Complete combustion of alkane yields

Question # 27

Alkenes combine readily with electrophillic reagents such as halogens giving

Question # 28

β-β- dichloroethyle sulphide is commonly known as:

Question # 29

Physical properties of alkanes increase with increase of all physical constants except

Question # 30

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

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Sr.# Question Answer
1 Which one of following is not monocyclic aromatic hydrocarbon
A. Benzaldehyde
B. Benzoic acid
C. Benzene sulfonic acid
D. Biphenyl
2 Incomplete oxidation of alkanes yields
A. CO2& carbon black
B. CO2+ heat
C. CO and carbon black
D. CO + heat
3 Hydrocarbons are organic compounds which contain elements such as
A. Hydrogen
B. Carbon
C. Hydrogen and carbon
D. Halogens
4 Which is liquid among the following alkenes?
A. Ethane
B. Propene
C. Butene
D. Pentene
5 Alkanes have functional group :
A. ----X
B. --OH
C. ----COH
D. No functional group
6 Benzene is obtained by fractional distillation of
A. Heavy oil
B. Anthracene oil
C. Middle oil
D. Light oil
7 The molecule of ethane possess which hybrization
A. sp3
B. sp2
C. sp
D. sp2d
8 Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively
A. Zinc dust and soda lime
B. Soda time and zinc dust
C. Zinc dust and sodium hydroxide
D. Soda lime and copper
9 The carbon, carbon bond length in benzene is
A. 1.54A°
B. 1.34A°
C. 1.20A°
D. 1.39A°
10 Cyclohexane can be converted not benzene in the presence of
A. Pt at 100°C
B. Pt at 250°C
C. Pd at room temperature
D. Pt at room temperature
11 In CH4, all the H-C-H bond angles are
A. 120°
B. 107°
C. 109°
D. 109.5°
12 Alkenes normally have ______ geometry
A. Tetrachedral
B. Linear
C. Planer
D. None
13 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
A. Elemination
B. Addition
C. Free radical substitution
D. Nucleophilic substation
14 Nitroalkane are used in
A. Fuel
B. Solvents
C. Organic synthesis
D. All of them
15 Synthesis rubber is made by polymerization :
A. Chloroform
B. Acetylene
C. Divinyl acetylene
D. Butene
16 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
17 Hydrocarbons contain :
A. Carbon only carbon
B. Hydrogen only
C. Carbon & hydrogen
D. Carbon , hydrogen & halogen
18 A single benzene ring can have ______ ortho position maximally
A. One
B. Two
C. Three
D. Four
19 Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
A. Chlorination, nitration, reducing
B. Nitration, chlorination, reducition
C. Nitration, reduction,chlorination
D. Nitration, reduction, acylation, chlorination, hydrolysis
20 The reaction in which ketone is reduced to the alkane is called
A. Kolb
B. Clemmensen
C. Cannizzaro
D. None
21 The three alternate single and double bonds in the benzene ring are called
A. Conjugate bonds
B. Resonating bonds
C. Both A and B
D. None of above
22 Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called
A. Wurtz reaction
B. Fitting reaction
C. Wurtz fitting reaction
D. None of these
23 Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes
A. 2
B. 1
C. 3
D. 4
24 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
25 When acetylene is passed through a copper tube at 300°C, it polymerizes to
A. Polyacetylene
B. polyethylene
C. Benzene
D. None of these
26 Benzene was discovered by Michael Faraday's in
A. 1824
B. 1825
C. 1826
D. 1827
27 Kolb's method of alkanes production, is actually
A. Hydrolysis
B. Catalysis
C. Electrolysis
D. Hydrogenation
28 Which of the following decolorized Br2-water
A. Methane
B. Ethane
C. Ethene
D. Propane
29 Ethylene can be prepared in the laboratory by heating together ethyl alcohol and
A. HCI
B. Phenol
C. HF
D. H2SO4
30 The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with
A. Hund's rule
B. Markownikov's rule
C. Pauli's Exclusion principle
D. Auf ban principle

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