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1 Chemistry MCQs

What is the name of the process used to make soap?

  • Saponification
  • Hydrolysis
  • Condensation
  • Polymerisation
0 Comments
Correct Answer: A. Saponification

Explanation:

Soap is made through a chemical process called saponification, which is a type ... Read More Details

2 Organic Chemistry MCQs

The rate of an E1 elimination reaction depends on which factor?

  • The concentration of the substrate
  • The concentration of the nucleophile
  • The concentration of both substrate and nucleophile
  • The concentration of base and nucleophile
0 Comments
Correct Answer: A. The concentration of the substrate

Explanation:

The E1 reaction (elimination unimolecular) is a type of elimination reaction in organic ... Read More Details

3 Organic Chemistry MCQs

Elimination bimolecular (E2) reactions involve which type of kinetics?

  • First-order kinetics
  • Second-order kinetics
  • Third-order kinetics
  • Zero-order kinetics
0 Comments
Correct Answer: B. Second-order kinetics

Explanation:

The E2 reaction (elimination bimolecular) is one of the fundamental types of elimination ... Read More Details

4 Organic Chemistry MCQs

Why is the Grignard reagent highly reactive?

  • Because of the presence of a halogen atom
  • Because of the presence of a magnesium atom
  • Because of the polarity of the C–Mg bond
  • All of the above
0 Comments
Correct Answer: C. Because of the polarity of the C–Mg bond

Explanation:

Grignard reagents, with the general formula R–MgX (where R is an alkyl or ... Read More Details

5 Organic Chemistry MCQs

The ether used in Wurtz synthesis is ?

  • Diethyl ether
  • Dimethyl ether
  • Ethyl methyl ether
  • Phenyl ether
0 Comments
Correct Answer: A. Diethyl ether

Explanation:

The Wurtz synthesis is a well-known organic reaction used for the preparation of ... Read More Details

6 Organic Chemistry MCQs

Which one of the following species is not an electrophile?

  • NH₃
  • Br⁺
  • H⁺
  • BF₃
0 Comments
Correct Answer: A. NH₃

Explanation:

In organic chemistry, species are classified as electrophiles or nucleophiles based on how ... Read More Details

7 Organic Chemistry MCQs

Ethyl magnesium bromide + acetone (then hydrolysis) gives which alcohol?

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

Explanation:

Grignard reagents are versatile organometallic compounds used widely in organic synthesis to form ... Read More Details

8 Organic Chemistry MCQs

Which one of the following molecules does not form alcohol when it reacts with a Grignard reagent?

  • Formaldehyde
  • Acetaldehyde
  • Propanone
  • Carbon dioxide
0 Comments
Correct Answer: D. Carbon dioxide

Explanation:

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

9 Organic Chemistry MCQs

In primary alkyl halides, the halogen-bearing carbon is bonded to how many other carbons?

  • Two
  • Three
  • One
  • Four
0 Comments
Correct Answer: C. One

Explanation:

Primary alkyl halides form a major class of organic compounds that play an ... Read More Details

10 Organic Chemistry MCQs

The best method for the preparation of alkyl halides is the reaction of alcohol with:

  • Zn / HCl
  • SOCl₂ / Pyridine
  • PCl₃
  • PCl₅
0 Comments
Correct Answer: B. SOCl₂ / Pyridine

Explanation:

Alkyl halides can be prepared from alcohols by replacing the hydroxyl group (–OH) ... Read More Details

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