Job Exams Hero

Master Your JobExams with Confidence

Access thousands of practice questions, and improve your test-taking skills with our comprehensive MCQ platform. Whether you're preparing for FPSC, NTS, PPSC, CSS, or any other job test, Jobexams provides the study material you need to succeed. Start practicing now and boost your chances of acing your exams!

Browse Categories
Quick Results 0 found

Question Coming Soon!

"" isn't in our database yet, but we're adding new questions daily.

1 Organic Chemistry MCQs

What is the compound R–Mg–Br called?

  • Grignard reagent
  • Metallic alkyl halide
  • Both A & B
  • Alkyl
0 Comments
Correct Answer: A. Grignard reagent

Explanation:

The compound R–Mg–Br is known as a Grignard reagent. It is an organometallic ... Read More Details

2 Organic Chemistry MCQs

Which of the following is the most reactive hydrocarbon?

  • Ethane
  • Ethyne
  • Ethene
  • Benzene
0 Comments
Correct Answer: C. Ethene

Explanation:

The reactivity of hydrocarbons depends on the type of bonding between carbon atoms ... Read More Details

3 Organic Chemistry MCQs

Introduction of a nitro group (–NO₂) in a molecule is called ?

  • Nitration
  • Halogenation
  • Sulphonation
  • Amination
0 Comments
Correct Answer: A. Nitration

Explanation:

Nitration is a fundamental chemical reaction in organic chemistry that involves the introduction ... Read More Details

4 Organic Chemistry MCQs

The gas used in the manufacture of urea fertilizer is ?

  • C₂H₆ (Ethane)
  • C₂H₄ (Ethene)
  • C₂H₂ (Ethyne)
  • CH₄ (Methane)
0 Comments
Correct Answer: D. CH₄ (Methane)

Explanation:

Urea fertilizer is one of the most important nitrogen-containing fertilizers used in agriculture. ... Read More Details

5 Organic Chemistry MCQs

Which of the following compounds will show acidic character?

  • Propyne
  • 1-Butyne
  • Ethyne
  • All of the above
0 Comments
Correct Answer: D. All of the above

Explanation:

The acidic character of alkynes arises from the presence of a hydrogen atom ... Read More Details

6 Organic Chemistry MCQs

Alkenes are produced from dehalogenation of ?

  • Dihalo alkane
  • Trihalo alkane
  • Vicinal dihalo alkane
  • Vicinal trihalo alkane
0 Comments
Correct Answer: C. Vicinal dihalo alkane

Explanation:

The process of dehalogenation involves the removal of halogen atoms from an organic ... Read More Details

7 Organic Chemistry MCQs

In unsaturated hydrocarbons, electrons favor ?

  • Less reactivity
  • Addition reactions
  • Substitution reactions
  • None
0 Comments
Correct Answer: B. Addition reactions

Explanation:

Unsaturated hydrocarbons include alkenes (C=C) and alkynes (C≡C) — compounds containing one or ... Read More Details

8 Organic Chemistry MCQs

Which one of the following compounds is known as Chloroform?

  • CH₂Cl₂
  • CH₃Cl
  • CHCl₃
  • CCl₄
0 Comments
Correct Answer: C. CHCl₃

Explanation:

Chloroform (CHCl₃), chemically known as trichloromethane, is a halogenated hydrocarbon formed by replacing ... Read More Details

9 Organic Chemistry MCQs

Which gas is used for artificial ripening of fruits?

  • Ethane
  • Ethene
  • Ethyne
  • Methane
0 Comments
Correct Answer: B. Ethene

Explanation:

Ethene (C₂H₄), also known as ethylene, is a simple unsaturated hydrocarbon containing a ... Read More Details

10 Organic Chemistry MCQs

Preparation of vegetable ghee involves ?

  • Halogenation
  • Hydroxylation
  • Hydrogenation
  • Hydration
0 Comments
Correct Answer: C. Hydrogenation

Explanation:

The preparation of vegetable ghee is based on a chemical process called hydrogenation ... Read More Details