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10th Class Chemistry Chapter 12 Hydrocarbons English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
Which one of the following is gas at room temperature:
Choose an answer
C2H6
C6H14
C6H6
C8H18
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Question # 2
Volatility of hydrocarbons deceases with:
Choose an answer
decrease of molecular mass
increase of molecular mass
increase of double or triple bonds
decrease of triple bonds
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Question # 3
Traces of acetylene are present to coal gas about.
Choose an answer
0.06 %
0.08%
1.1 %
90%
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Question # 4
Which one of these hydrocarbon molecules would have no effect on an aqueous solution of bromine?
Choose an answer
CH
4
C
10
H
20
C
2
H
4
C
2
H
2
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Question # 5
Dehydration of alcohols can be carried out with.
Choose an answer
NaOH
KOH
H
2
SO
4
HCl
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Question # 6
The reduction of alkyl halides takes place in the presence of.
Choose an answer
Zn/HCl
Na/HCl
Mg/HCl
Cu/HCl
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Question # 7
Halogenation of methane produces following valuable chemical compounds used as solvents except.
Choose an answer
Carbonterachloride
Chloroform
Carbon Black
Chloromethane
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Question # 8
Alkanes do not react in
Choose an answer
Diffused sunlight
Dark
Bright sunlight
None of these
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Question # 9
Which gas creates suffocation and causes death?
Choose an answer
CO
CO
2
SO
3
SO
2
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Question # 10
The end product of oxidation of acetylene is .
Choose an answer
Oxalic acid
Glyoxal
Glycol
None of these
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Question # 11
The order of reactivity of hydrogen halides with alkenes is.
Choose an answer
HI>HBr
HBr>HI
HCl>HBr
HBr < HCl
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Question # 12
Hydrogenation of alkenes and alkynes may be carried out at room temperature in the presence of catalyst:
Choose an answer
Pt or Pd
Ni
Zn
Fe2O3
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Question # 13
In which one of the following is a substitution reaction?
Choose an answer
Halogenations of alkynes
Halogenations of alkenes
Halogenations of alkanes
Bromination of alkenes
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