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

Vinyl acetylene combines with HCl to form:

Question # 2

Incomplete oxidation of alkanes yields

Question # 3

The carbon, carbon bond length in benzene is

Question # 4

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 # 5

Hybridization in alkanes is:

Question # 6

Meta directing group decreased the ----------- of benzene ring

Question # 7

An alkane is produced when an alkyle halide reacts with zinc in the presence of

Question # 8

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

Question # 9

Sp3hybird orbitals are oriented at an angle of

Question # 10

During nitration of benzene, the active nitrating agent is

Question # 11

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

Question # 12

To differentiate isomers we use

Question # 13

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

Question # 14

Which class of compound is more reactive

Question # 15

Benzene reacts with ozone and gives

Question # 16

Substituted phenyl groups are called

Question # 17

The method used only for the production of symmetrical alkanes

Question # 18

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

Question # 19

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

Question # 20

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 # 21

Alkyne is :

Question # 22

The benzene molecule contains

Question # 23

Write the name of following alkene CH2= CH - CH = CH2

Question # 24

The saturated hydrocarbons usually end with suffix ______

Question # 25

Which one gives acidic reactions?

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

The geometry of acetylene is

Question # 30

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

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Sr.# Question Answer
1 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
2 Sulphuric acid generates nitronium ion by reacting with
A. Nitric acid
B. Nitrogen gas
C. Nitrous acid
D. Potassium nitrate
3 Synthesis of rubber is made by polymerization of
A. Chloroform
B. Acetylene
C. Divinylacetylene
D. Butene
4 Toluene is also called
A. Hydroxyl benzene
B. Methyl benzene
C. ethyl benzene
D. None
5 Most common reactions of benzene and its derivatives are
A. electrophilic addition reactions
B. electrophilic substitution reactions
C. Nucleophilic addition reactions
D. Nucleophilic subtitution reactions
6 Write the name of following compound
A. 5 - methyle - 2- hexene
B. 2 - methyle hexene
C. 4 - ethyle - 2 - methyle hexene
D. 3 - ethyle - 3 - methyl hexene
7 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
8 When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product
A. Na2CO3
B. NaHCO3
C. Ca(OH)2
D. CaCO3
9 Acetylene gives
A. White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2
B. White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2C12
C. White ppt. with both
D. Red ppt. with both
10 Ethylene combines with water in the presence of H2SO4+ HgSO4and forms
A. Ethyle chloride
B. Ethyle alcohol
C. Carboxylic acid
D. None of these
11 Which is liquid among the following alkenes?
A. Ethane
B. Propene
C. Butene
D. Pentene
12 Kolb's method of alkanes production, is actually
A. Hydrolysis
B. Catalysis
C. Electrolysis
D. Hydrogenation
13 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
14 How many isomeric disubtituted products are obtained by the introducing of second group in the ring
A. Two
B. Three
C. Four
D. None
15 The C-C bond angles in benzene ring are
A. 119°
B. 120°
C. 121°
D. None
16 The hydrocarbon used for polymerization is
A. Alkanes
B. Alkenes
C. Alkynes
D. All of above
17 Benzene reacts with ozone and gives
A. Glycerin
B. Glyoxal
C. Maleic anhydride
D. Benzoic acid
18 The electron releasing effect of methyl group is significant and it makes ring a good
A. Electrophilic
B. Nucleophilic
C. Nucleophobic
D. Hydrophobic
19 Benzene does not undergo polymerization and it is also resistant to
A. Reduction
B. Oxidation
C. Alkylation
D. Ozonolysis
20 Synthesis rubber is made by polymerization :
A. Chloroform
B. Acetylene
C. Divinyl acetylene
D. Butene
21 Octane number is zero for
A. n-Heptane
B. Isooctane
C. n-Hexane
D. Isoheptane
22 Which of the following is not an electrophitic substitution reaction of benzene
A. Nitration
B. Sulphonation
C. Fridel-Craft alkylation
D. Free radical chlorination of benzene
23 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
24 An alkane is produced when an alkyle halide reacts with zinc in the presence of
A. HCl
B. CH3COOH
C. Both a & b
D. None
25 Alkanes are gases :
A. C1-C4
B. C5-C10
C. C11-C15
D. C10-C20
26 acetylene can be converted into-while passing through a Cu-tube at 300°C:
A. Glyoxal
B. Vinyl acetylene
C. Vinyl alcohol
D. Benzene
27 Polymerization of ethane take place at pressure of 100 atm and a temperature of
A. 200°C
B. 400°C
C. 600°C
D. 800°C
28 Which is symmetric alkene?
A. CH=C-CH2
B. CH≡CH
C. CH3-C≡C - CH3
D. B and C
29 Alkanes are soluble in all except
A. Benzene
B. Ether
C. Water
D. Carbon tetra chloride
30 Which of the following reaction is characteristic of benzene
A. Electrophilic substitution reaction
B. Reduction
C. Oxidation
D. Ozonolysis

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