ECAT Pre Engineering Chemistry Chapter 20 MCQ Test With Answer

Question # 1

Aromatic compounds burn with sooty flame cause:

They have high percentage of hydrogan A
They have ring structure B
They have high percentage of carbon C
They resist reaction with air D

Question # 2

Ratio of carbon to hydrogen in aromatic compounds is:

Low than alkanes A
High than alkanes B
Low than alkanes not high than alkanes C
High than alkanes D

Question # 3

Benzene gives reactions generally:

Electropholic subsitution A
addition B
synthesis C
addition and electropholic subsitution D

Question # 4

Benzene cannot undergo

substitution reactions A
addition reactions B
oxidation reactions C
elimination reactions D

Question # 5

Kekule structures contributed towards actual structure of benzene

60% A
70% B
80% C
90% D

Question # 6

Characterstics of aromaic are:

how hydrogen carbon ratio than alkanes A
characterstics oudour B
a &B C
Characterstics properties D

Question # 7

Benzene gives reactions generally:

Electropholic subsitution A
addition B
synthesis C
addition and electropholic subsitution D

Question # 8

Bond angle in benzene is

109.5° A
180° B
120° C
107.20 D

Question # 9

The benzene molecule contains:

Three double bond A
Two double bond B
One double bond C
DelocalizedᏘ electron charge D

Question # 10

The hydridization in benzene is

sp³ A
sp² B
sp⁴ C
dsp² D

Question # 11

Simple aromatic compound is:

benzene A
toluene B
aniline C
phenol D

Question # 12

Which of the following is explosive?

Trinitrophenol A
Nitrophenol B
Nitromethane C
Nitrobenzene D

Question # 13

Which term was derived from atomos?

atom A
hydrocarbon B
aromatic C
aliphatic D

Question # 14

Aromatic hydrocarbons are the derivatives of:

Normal series of parrafins A
Alkene B
Benzene C
Cyclohexane D

Question # 15

empirical formula mass of benzene is time lesser than moleculer formula mass:

four A
five B
six C
seven D

Question # 16

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

toluene A
benzene B
nitrobenzene C
chlorobenzene D

Question # 17

Resonance energy of benzene is (in KJ mol^-1):

120 A
150 B
170 C
180 D

Question # 18

Benzene was discovered by first of all:

Micheal Faraday A
Hofmann B
Ainderson C
Sorenbon D

Question # 19

Ozonolysis of benzene gives:

Nitration A
sulphonation B
ozonide C
glyoxal D

Question # 20

The electrophile in aromatic sulphontion is:

H₂SO₄ A
HSO₄ B
SO₃ C
SO₃₊ D

Question # 21

The electrophile in aromatic sulphonation Is

H₂SO₄ A
HSO₄^- B
SO₃ C
SO₃⁺ D

Question # 22

Acylation of benzene to produce aliphatic aromatic ketones is known as:

Friedel Craft's reaction A
Benzene condensation B
Hydroformylation C
Cellemense

D

Question # 23

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

Toluene A
Benzene B
nitrobenzene C
chlorobenzene D

Question # 24

Which of the following acid can be used as a catalyst in Friedel Craft's reaction?

AlCl₃ A
HNO₃ B
BeCl₂ C
NaCl D

Question # 25

Which of the following is explosive:

Trinitropheonal A
Nitropheonal B
Nitromethane C
Nitrobenzene D

Question # 26

Ozonolysis of benzene gives

nitration A
sulphonation B
ozonide C
glyoxal D

Question # 27

Empirical formula mass of benzene is times lesser than molecular formula mass

four A
five B
six C
seven D

Question # 28

Aromatic compounds burn with sooty flame cause

They have high percentage of hydrogen A
They have a ring structure B
They have high percentage of carbon C
They resist reaction with air D

Question # 29

Arenes are also called

atom A
hydrocarbons B
aromatic C
benzene D

Question # 30

Which is the property of benzene:

Decolourizes KMnO₄ A
straight chain structure B
only double bond is present C
triple and double bond D

Sr.#	Question	Answer
1	The benzene molecule contains:	A. Three double bond B. Two double bond C. One double bond D. DelocalizedᏘ electron charge
2	Benzene acid can be prepared from the oxidation of:	A. benzene B. ethyl benzene C. benzonic acid D. toluene
3	Resonance energy of benzene is (in KJ mol^-1):	A. 120 B. 150 C. 170 D. 180
4	Aromatic compounds burn with sooty flame cause:	A. They have high percentage of hydrogan B. They have ring structure C. They have high percentage of carbon D. They resist reaction with air
5	Empirical formula mass of benzene is times lesser than molecular formula mass	A. four B. five C. six D. seven
6	The hydridization in benzene is	A. sp³ B. sp² C. sp⁴ D. dsp²
7	Which of the following is explosive?	A. Trinitrophenol B. Nitrophenol C. Nitromethane D. Nitrobenzene
8	Benzene gives reactions generally	A. electrophilic B. addition substitution C. synthesis D. addition and electrophilic substitution
9	Aromatic hydrocarbons are the derivatives of:	A. Normal series of parrafins B. Alkene C. Benzene D. Cyclohexane
10	Which of the following is explosive:	A. Trinitropheonal B. Nitropheonal C. Nitromethane D. Nitrobenzene

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ECAT Pre Engineering Chemistry Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 20 Aromatic Hydrocarbons

ECAT Chemistry Chapter 20 Aromatic Hydrocarbons

Aromatic compounds burn with sooty flame cause:

Ratio of carbon to hydrogen in aromatic compounds is:

Benzene gives reactions generally:

Benzene cannot undergo

Kekule structures contributed towards actual structure of benzene

Characterstics of aromaic are:

Benzene gives reactions generally:

Bond angle in benzene is

The benzene molecule contains:

The hydridization in benzene is

Simple aromatic compound is:

Which of the following is explosive?

Which term was derived from atomos?

Aromatic hydrocarbons are the derivatives of:

empirical formula mass of benzene is time lesser than moleculer formula mass:

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

Resonance energy of benzene is (in KJ mol-1):

Benzene was discovered by first of all:

Ozonolysis of benzene gives:

The electrophile in aromatic sulphontion is:

The electrophile in aromatic sulphonation Is

Acylation of benzene to produce aliphatic aromatic ketones is known as:

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

Which of the following acid can be used as a catalyst in Friedel Craft's reaction?

Which of the following is explosive:

Ozonolysis of benzene gives

Empirical formula mass of benzene is times lesser than molecular formula mass

Aromatic compounds burn with sooty flame cause

Arenes are also called

Which is the property of benzene:

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Resonance energy of benzene is (in KJ mol^-1):