Free Chemistry of Hydrocarbons MCQs with Answers
1,091 Chemistry of Hydrocarbons MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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Read the Chemistry of Hydrocarbons notesFree MDCAT chapter notes with key terms1,091 questions · page 55 of 55
- A. Chlorobenzene
- B. Acetophenone
- C. Benzoic acid
- D. Benzophenone
Explanation: The reaction between benzene and acetyl chloride in the presence of lewis acid results in the formation of an aryl ketone , methyl phenyl…
Correct answer: Acetophenone- A. Benzene
- B. Toluene
- C. O-Xylene
- D. Metaxylene
Explanation: Acetylene on passing through a red hot iron tube undergoes cyclic polymerization.
Correct answer: Benzene- A. -OH
- B. -NH2
- C. -Cl
- D. -OCH3
Explanation: In electrophilic aromatic substitution, the nature of the substituent on the benzene ring plays a crucial role in determining the position…
Correct answer: -Cl- A. Benzene
- B. Toluene
- C. Benzoic acid
- D. Nitrobenzene
Explanation: The correct answer is Toluene. Toluene undergoes nitration much faster than benzene due to the presence of a methyl group.
Correct answer: Toluene- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Cresol is a derivative of benzene that has a methyl group CH3 and a phenol group OH attached to the benzene ring.Ortho-Cresol, also called…
Correct answer: Option D- A. -OH
- B. -NR2
- C. -CN
- D. -OR
Explanation: The correct answer is -CN. The -CN group is a meta-directing group because it withdraws electron density from the benzene ring…
Correct answer: -CN- A. -NH4+
- B. -NH3
- C. -C≡N
- D. -COR
Explanation: Activating groups are Atoms or groups that make the benzene molecule more reactive by increasing the ring's electron density.The resonance…
Correct answer: -NH4+- A. Nitrobenzene
- B. Benzoic acid
- C. Benzaldehyde
- D. Phenol
Explanation: Option "a) Nitrobenzene," "b) Benzoic acid," and "c) Benzaldehyde" do not have electron-donating groups like the hydroxyl group in phenol.
Correct answer: Phenol- A. m-nitro benzoic acid
- B. o-nitro benzene methanoic acid
- C. o-nitro benzoic acid
- D. None of the above
Explanation: When two functional groups are next to each other in a benzene ring, we call them ortho group or o-group.
Correct answer: o-nitro benzene methanoic acid- A. m-chloro nitrobenzene
- B. o-chloro nitrobenzene
- C. p-chloro nitrobenzene
- D. All of above
Explanation: When nitrobenzene and chlorine come together in the presence of AlCl3, they undergo a chemical reaction.
Correct answer: m-chloro nitrobenzene- A. Benzene
- B. 1,3 -Dinitrobenzene
- C. Nitrobutene
- D. 1,3,5 trinitrobenzene
Explanation: Benzene is reactive because of its delocalized pi electron system. This system of alternating double bonds makes benzene more stable than…
Correct answer: Benzene