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1 Organic Chemistry MCQs

For which of the following reaction mechanisms is the first step the same?

  • E1 and E2
  • E2 and SN2
  • E1 and SN1
  • SN1 and SN2
0 Comments
Correct Answer: C. E1 and SN1

Explanation:

Organic reaction mechanisms such as substitution (SN1, SN2) and elimination (E1, E2) differ ... Read More Details

2 Organic Chemistry MCQs

Which one of the following reactants gives a straight-chain alcohol when reacted with a Grignard reagent followed by hydrolysis?

  • Formaldehyde
  • Ketone
  • Ethylene oxide
  • Both A & C
0 Comments
Correct Answer: D. Both A & C

Explanation:

Grignard reagents (R–MgX) are highly reactive organometallic compounds that react with many electrophiles ... Read More Details

3 Organic Chemistry MCQs

When ethylene oxide is treated with a Grignard reagent followed by acid hydrolysis, it yields which compound?

  • Primary alcohol
  • Secondary alcohol
  • Tertiary alcohol
  • Dihydric alcohol
0 Comments
Correct Answer: A. Primary alcohol

Explanation:

Grignard reagents are highly reactive organometallic compounds of the general formula R–MgX, where ... Read More Details

4 Organic Chemistry MCQs

Alkyl halides usually undergo which type of reaction?

  • Nucleophilic substitution
  • Nucleophilic addition
  • Elimination
  • Both A & C
0 Comments
Correct Answer: D. Both A & C

Explanation:

Alkyl halides, also called haloalkanes, are organic compounds in which a halogen atom ... Read More Details

5 Organic Chemistry MCQs

Which one of the following is known as Benzyl alcohol?

  • C₆H₅OH
  • C₆H₅CH(OH)₂
  • C₆H₅CH₂OH
  • C₆H₅COOH
0 Comments
Correct Answer: C. C₆H₅CH₂OH

Explanation:

Benzyl alcohol is an important aromatic alcohol with the molecular formula C₆H₅CH₂OH. It ... Read More Details

6 Organic Chemistry MCQs

Which one of the following is also known as tartaric acid?

  • 2,3-dihydroxybutanedioic acid
  • Oxalic acid
  • Succinic acid
  • Citric acid
0 Comments
Correct Answer: A. 2,3-dihydroxybutanedioic acid

Explanation:

Tartaric acid is a naturally occurring organic acid that is widely distributed in ... Read More Details

7 Organic Chemistry MCQs

The residue left after sugar crystallization from sugarcane juice is called?

  • Jaggery
  • Molasses
  • Treacle
  • Glucose syrup
0 Comments
Correct Answer: B. Molasses

Explanation:

When sugar is produced from sugarcane juice, the process involves concentration, clarification, and ... Read More Details

8 Organic Chemistry MCQs

Which is the correct enzyme sequence in starch fermentation?

  • Diastase → Zymase → Maltase
  • Diastase → Maltase → Zymase
  • Zymase → Maltase → Diastase
  • Maltase → Diastase → Zymase
0 Comments
Correct Answer: B. Diastase → Maltase → Zymase

Explanation:

The fermentation of starch into alcohol is a multi-step biochemical process that involves ... Read More Details

9 Organic Chemistry MCQs

K₂Cr₂O₇/H₂SO₄ generates ____________________?

  • Chromic acid (H₂CrO₄)
  • Chromium trioxide (CrO₃)
  • Nascent oxygen [O]
  • All of these
0 Comments
Correct Answer: D. All of these

Explanation:

When potassium dichromate (K₂Cr₂O₇) is treated with dilute sulfuric acid (H₂SO₄), the acidic ... Read More Details

10 Organic Chemistry MCQs

Which alcohol forms an alkene with acidic potassium dichromate?

  • Primary alcohol
  • Secondary alcohol
  • Tertiary alcohol
  • All of these
0 Comments
Correct Answer: C. Tertiary alcohol

Explanation:

When alcohols are treated with acidic potassium dichromate (K₂Cr₂O₇/H₂SO₄), they undergo oxidation reactions. ... Read More Details