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Chemistry MCQs

Prepare for competitive exams with our topic-wise Chemistry MCQs covering fundamental and advanced concepts. These multiple-choice questions include atomic structure, chemical bonding, periodic table, acids & bases, organic chemistry, thermodynamics, chemical equations, mole concept, electrochemistry, and biochemistry. Ideal for science students and job aspirants appearing in PPSC, FPSC, CSS, NTS, SPSC, BPSC, KPSC, ETEA, AJKPSC, and other testing services. A valuable resource for teachers, educators, and candidates targeting science educator posts, laboratory roles, and general science sections in public sector exams.

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1 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

2 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

3 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

4 Organic Chemistry MCQs

Which one of the following compounds is known as Chloroform?

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

Explanation:

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

5 Organic Chemistry MCQs

Which gas is used for artificial ripening of fruits?

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

Explanation:

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

6 Organic Chemistry MCQs

Preparation of vegetable ghee involves ?

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

Explanation:

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

7 Organic Chemistry MCQs

Which compound is known as methyl cyanide?

  • CH₃NH₂
  • CH₃NO₂
  • CH₃CN
  • CH₂ = CH–CN
0 Comments
Correct Answer: C. CH₃CN

Explanation:

Methyl cyanide (CH₃CN) is an organic compound belonging to the nitrile family. Its ... Read More Details

8 Organic Chemistry MCQs

When one hydrogen atom is removed from an alkane, it is called ?

  • Alkene
  • Alkyl
  • Aldehyde
  • Saturated hydrocarbon
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Correct Answer: B. Alkyl

Explanation:

In organic chemistry, alkanes are the simplest hydrocarbons, consisting only of single bonds ... Read More Details

9 Organic Chemistry MCQs

Sabatier–Senderens reaction involves _____________ in the presence of Ni?

  • Alkene & H₂
  • Alkene & O₂
  • Alkene & N₂
  • Alkyne & Cl₂
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Correct Answer: A. Alkene & H₂

Explanation:

The Sabatier–Senderens reaction is an important hydrogenation process in organic chemistry, discovered by ... Read More Details

10 Organic Chemistry MCQs

Clemmensen’s reduction involves the reduction of which compound?

  • Ketone
  • Aldehyde
  • Alkane
  • All of the above
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Correct Answer: A. Ketone

Explanation:

Clemmensen’s reduction is an important organic reaction used to convert ketones (and sometimes ... Read More Details

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