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Organic Chemistry: Mechanisms & Reactions
JEE Chemistry • 10 questions • Free on ExamBattle
Practice Questions
Q1
The major product when propene reacts with HBr is:
- A. 1-bromopropane
- B. 2-bromopropane
- C. 1,2-dibromopropane
- D. allyl bromide
Q2
SN2 reactions are favoured by:
- A. Tertiary substrates and polar protic solvents
- B. Primary substrates and polar aprotic solvents
- C. Tertiary substrates and weak nucleophiles
- D. Secondary substrates in gas phase
Q3
Which of the following compounds can undergo aldol condensation?
- A. Acetaldehyde (CH₃CHO)
- B. Benzaldehyde (C₆H₅CHO)
- C. Acetone (CH₃COCH₃)
- D. Formaldehyde (HCHO)
Q4
Which of the following are correct about benzene?
- A. All C–C bond lengths are equal (1.40 Å)
- B. It preferentially undergoes electrophilic substitution
- C. It has alternating single and double bonds
- D. It is planar
Q5
Grignard reagent (RMgX) can react with which of the following to give alcohol after hydrolysis?
- A. Formaldehyde (HCHO)
- B. Acetaldehyde (CH₃CHO)
- C. Dry ice (CO₂)
- D. Acetone (CH₃COCH₃)
Q6
How many σ (sigma) bonds are present in one molecule of ethyne (HC≡CH)?
Answer: numerical value
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