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12th Grade > Chemistry

GENERAL ORGANIC CHEMISTRY MCQs

Total Questions : 23 | Page 3 of 3 pages
Question 21. Dehydrohalogenation of an alkyl halide is a/an?
  1.    Nucleophilic substitution reaction
  2.    Elimination reaction
  3.    Both nucleophilic substitution and elimination reaction
  4.    Rearrangement
 Discuss Question
Answer: Option B. -> Elimination reaction
:
B
Dehydrohalogenation of an alkyl halide in the presence of alcoholic potash is an example of elimination reaction.
R−CH2CH2−Cl+KOHalcΔ→
RCH=CH2+KCl+H2O
Question 22. Number of  π electrons in cyclobutadienyl anion (C4H4)−2 is?
 
  1.    2
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option D. -> 8
:
D
Number Of  π Electrons In Cyclobutadienyl Anion (C4H4)−2...
Question 23. Homolytic fission of C - C bond in ethane gives an intermediate in which carbon is?
  1.    sp3  hybridised
  2.    sp2  hybridised
  3.    sp hybridised
  4.    sp2d  hybridised
 Discuss Question
Answer: Option B. -> sp2  hybridised
:
B
Homolytic Fission Of C - C Bond In Ethane Gives An Intermedi...

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