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ALKANE MCQs

Total Questions : 20 | Page 1 of 2 pages
Question 1. The other name for branched chain alkanes is _____________
  1.    Paraffins
  2.    Isoparaffins
  3.    Neoparaffins
  4.    Naphthenes
 Discuss Question
Answer: Option B. -> Isoparaffins
Question 2. Which among the following is not an alkane isomer with 6 carbon atoms?
  1.    Hexane
  2.    2,2-dimethylbutane
  3.    2,3-dimethylbutane
  4.    Neopentane
 Discuss Question
Answer: Option D. -> Neopentane
Question 3. Identify the incorrect statement
  1.    They are very reactive
  2.    They have very less biological activity
  3.    Petroleum and natural gas are the main sources of alkanes
  4.    Alkanes with repeated –CH2– units constitute a homologus series
 Discuss Question
Answer: Option A. -> They are very reactive
Question 4. Select the incorrect statement regarding alkanes
  1.    It is an acyclic saturated hydrocarbon
  2.    It is otherwise known as Paraffin
  3.    In alkanes, C-C bonds are single
  4.    Alkanes have the general formula CnH2n
 Discuss Question
Answer: Option D. -> Alkanes have the general formula CnH2n
Question 5. Identify the simplest alkane
  1.    Methane
  2.    Ethane
  3.    both a and b
  4.    none of these
 Discuss Question
Answer: Option A. -> Methane
Question 6. Select the minimum number of carbon atoms, a molecule must possess so as to be regarded as a higher alkane
  1.    15
  2.    16
  3.    17
  4.    18
 Discuss Question
Answer: Option C. -> 17
Question 7. The general formula of alkane is-
  1.    CnH 2n+2
  2.    CnH2n
  3.    CnH2n-2
  4.    C2H2
 Discuss Question
Answer: Option A. -> CnH 2n+2
Question 8. Which of the following is the most volatile compound?
  1.    n-pentane
  2.    Isobutane
  3.    2-methyl butane
  4.    2, 2-dimethyl propane
 Discuss Question
Answer: Option D. -> 2, 2-dimethyl propane
Question 9. Alkanes undergo halogenation
  1.    elimination
  2.    nucleophilic substitution
  3.    free-radical substitution
  4.    electrophilic substitution
 Discuss Question
Answer: Option C. -> free-radical substitution
Question 10. If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
  1.    20
  2.    22
  3.    40
  4.    42
 Discuss Question
Answer: Option D. -> 42

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