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Chemistry Class 12 Chapter 9
Aromatic Hydrocarbons
Test 7
1.
Which pair of group contains both ortho and para directions?
-N(CH
2
)
2
, -NH
2
-OH , -RCO
-OH , -CHO
-NR
3
, -CN
2.
In benzene the C-C bond length is greater than C-H bond length by?
0.307 A
o
0.337 nm
0.337 A
o
0.307 nm
3.
The molecular formula of biphenyl methane is?
C
13
H
12
C
12
H
10
C
13
H
13
C
12
H
12
4.
The heat of hydration of cyclohexene is?
119.5 KJ/mol
-219.5 KJ/mol
-119.5 KJ/mol
219.5 KJ/mol
5.
Aniline is a derivative of benzene which contains?
Alcoholic group
Amino group
Amide group
Hydroxyl group
6.
Which is not the meta directing group?
-CN
-CHO
-COOH
-CN
7.
How many pi electrons are in benzene?
6
3
8
5
8.
The molecular formula of toluene is?
C
7
H
7
C
8
H
8
C
8
H
7
C
7
H
8
9.
Molecular mass of benzene was considered as 78.108 by method of?
Specified gravity
X-ray diffraction
Vapour density method
Distillation method
10.
In benzene sulphonic acid, the sulphonic group is attached with benzene through?
-OH
Sulpher
Hydrogen
Oxygen
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