ECAT Pre Engineering Chemistry Chapter 19 MCQ Test With Answer

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

Marsh gas was the name given to

Question # 2

The hydrocarbon used for polymerization is

Question # 3

Benzene is obtained from benzene sulphonic acid by treating with

Question # 4

Alkenes combine readily with electrophillic reagents such as halogens giving

Question # 5

To differentiate isomers we use

Question # 6

Odour of alkene is:

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

Which gas is produced by treating CaC2with water

Question # 9

Write the name of following compound

Question # 10

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

Question # 11

Eletronegativity difference in C-C bond in alkanes is:

Question # 12

What is not a common use of methane

Question # 13

Kolb's method has limited synthetic applications due to

Question # 14

The electron releasing effect of methyl group is significant and it makes ring a good

Question # 15

Th IUPAC name of the compound having formula (CH3) 3 C - CH = CH2 is

Question # 16

Which class of compound is more reactive

Question # 17

The general formula of alkane is

Question # 18

The simplest and the parent members of aromatic hydrocarbon is

Question # 19

Alkynes are colourless & odouless except

Question # 20

The empirical formula of benzene is determined by

Question # 21

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

Question # 22

During nitration of benzene, the active nitrating agent is

Question # 23

An alkynes having Carbon count of 20 is

Question # 24

Amongst the following the compound that can be most readily sulphonated is

Question # 25

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

Question # 26

Hydrogenation of alkenes/alkynes inthe presence of Ni as catalyst at 3000°C result in the formation of corresponding alkanes. This reaction is known as

Question # 27

Which one does not declourized KMnO4

Question # 28

Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to

Question # 29

Which one gives acidic reactions?

Question # 30

Reaction of ethanes with KMnO4 gives:

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Sr.# Question Answer
1 Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon
2 Benzene does not undergo
A. Substitution reaction
B. Addition reaction
C. Oxidation reaction
D. Elimination reaction
3 Amongst the following the compound that can be most readily sulphonated is
A. Toluene
B. Benzene
C. Nitrobenzene
D. Chlorobenzene
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 The C-C bond angles in benzene ring are
A. 119°
B. 120°
C. 121°
D. None
6 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
7 Which of the following reaction is characteristic of benzene
A. Electrophilic substitution reaction
B. Reduction
C. Oxidation
D. Ozonolysis
8 The electron releasing effect of methyl group is significant and it makes ring a good
A. Electrophilic
B. Nucleophilic
C. Nucleophobic
D. Hydrophobic
9 The Total coal resources of Pakistan are estimated to be
A. 184 billion
B. 184 million tones
C. 1.84 billion tounes
D. 1.84 million tonnes
10 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
11 The temp. used for the hydrogenation of alkenes using Ni is
A. 2000°C
B. 400°C
C. 200-- 300°C
D. 1000°C
12 The reaction in which ketone is reduced to the alkane is called
A. Kolb
B. Clemmensen
C. Cannizzaro
D. None
13 "Each different compound should have a different name" was published by IUPAC system of nomenclature in
A. 1892
B. 1830
C. 1947
D. 1979
14 The presence of a double bond in a compound in the sign of:
A. Saturation
B. Unsaturation
C. Subsitution
D. None
15 The compound prepared by a substitution reaction of benzene is
A. Acetophenone
B. Glyoxal
C. Cyclohexame
D. Hexabromo cyclohexane
16 C18and onward hydrocarbons are normally
A. Gases
B. Liquids
C. Solids
D. Plasma
17 Benzene is not prepared from
A. Acetylene
B. Phenol
C. Benzoic acid
D. Bromo benzene
18 The order of reactivity of halogens in aliphatic substitution reactions is
A. Br2 > C12 > F2
B. C12 > Br2 > F2
C. C12 C12 > Br2
D. F2 > Br2 > C12
19 When n-hexane is heated in the presence of Pt at 500°C, it cyclists to give
A. Benzene
B. Cyclohexene
C. Benzene
D. Toluene
20 The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called
A. Isomerization
B. polymerization
C. Hybridization
D. Resonance
21 Benzene does not undergo polymerization and it is also resistant to
A. Reduction
B. Oxidation
C. Alkylation
D. Ozonolysis
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 The empirical formula of benzene is determined by
A. IR spectra
B. U.V
C. Elemental analysis
D. NMR spectra
24 An organic compound, on treatment with Br2 in CC14 gives bromoderivative of an alkene. The compound will be
A. CH3 - CH = Ch2
B. CH3CH = CHCH3
C. HC = CH
D. H2C = CH2
25 A salt producing hydrocarbon among these compounds is
A. Ehyne
B. Ethene
C. Methane
D. Ethane
26 Which of the following decolorized Br2-water
A. Methane
B. Ethane
C. Ethene
D. Propane
27 Write the name of following alkene CH2= CH - CH = CH2
A. 1,3 butadiene
B. Butra -1, 3-diene
C. Both a & b
D. None
28 Zn + HCI are used in
A. Clemenson reduction
B. Wof kishner reduction
C. Kolb's electrolysis
D. Wutruz reaction
29 Alkanes are least reactive towards:
A. Acids and bases
B. Reducing agents
C. Oxidizing agents
D. All of these
30 Which of the following acid can be used as a catalyst in Friedal Craft's reactions
A. AlCl3
B. HNO3
C. BeCl2
D. NaCl

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