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Chemistry 10th Class English Medium Unit 12 Online Test MCQs With Answers
Question # 1
One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X.
Choose an answer
C
3
H
8
C
6
H
12
C
4
H
10
C
7
H
16
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Question # 2
Dichloromethane reacts with halogens in the presence of diffused sun light and produces
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Carbon tetrachloride
Chloroform
Chloromethane
No reaction
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Question # 3
Volatility of hydrocarbons deceases with:
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decrease of molecular mass
increase of molecular mass
increase of double or triple bonds
decrease of triple bonds
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Question # 4
The reduction of alkyl halides takes place in the presence of
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Zn/HCl
Na/HCl
Mg/HCl
Cu/HCl
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Question # 5
The general formula of alkynes is
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C
n
H
2n
C
n
H
2n+2
C
n
H
2n-2
C
n
H
2n+1
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Question # 6
How many percent of natural gas is consisted of methane.
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60%
70%
80%
85%
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Question # 7
Hydrogenation of vegetable oil to convert it into banaspatic ghee is carried out in the presence of catalyst:
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Ni-metal
Zn-metal
Na - Metal
Fe2O3
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Question # 8
Ethylene is present is natural gas sometimes to the extent of .
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10%
20%
30%
40%
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Question # 9
Which one is the formula of chloromethane.
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CH
2
Cl
2
CCl
4
CH
Cl
3
CH
3
Cl
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Question # 10
Molecular formula of butyne is .
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C
4
H
6
C
3
H
4
C
4
H
7
C
4
H
8
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Question # 11
Oxidation of ethene with KMnO
4
produces.
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oxalic acid
glyoxal
ethene glycol
Propene glycol
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Question # 12
Which gas in produced during ripening of bnabanas.
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Methane
Ethene
Acetylene
Carbon dioxide
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Question # 13
General formula of alkynes is:
Choose an answer
C
n
H
n
C
n
H
2n
C
n
H
2n+2
C
n
H
2n-2
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