info@jobexams.pk
Job Exams Hero

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.

Browse Categories
Quick Results 0 found

Question Coming Soon!

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

1 Physical Chemistry MCQs

The sum of protons and neutrons in an atom gives which number?

  • Nucleon number
  • Mass number
  • Atomic number
  • Both A and B
0 Comments
Correct Answer: D. Both A and B

Explanation:

Atoms are made of protons, neutrons, and electrons. Protons and neutrons are located ... Read More Details

2 Inorganic Chemistry MCQs

What is the molecular weight of Ammonia (NH₃)?

  • 17.031 g/mol
  • 18.031 g/mol
  • 19.031 g/mol
  • 27.033 g/mol
0 Comments
Correct Answer: A. 17.031 g/mol

Explanation:

Ammonia (NH₃) is a simple nitrogen-containing compound widely used in fertilizers, cleaning products, ... Read More Details

3 Inorganic Chemistry MCQs

The absolute value of charge on an electron was determined by __________?

  • J.J. Thomson
  • Chadwick
  • Rutherford
  • Robert Millikan
0 Comments
Correct Answer: D. Robert Millikan

Explanation:

The absolute charge of an electron was determined by Robert Millikan through his ... Read More Details

4 Inorganic Chemistry MCQs

The discovery of the neutron was delayed because __________?

  • It does not carry any charge
  • It does not move
  • It is a fundamental particle
  • It is present in the nucleus
0 Comments
Correct Answer: A. It does not carry any charge

Explanation:

The neutron is a subatomic particle found in the nucleus of an atom ... Read More Details

5 Inorganic Chemistry MCQs

What is the molecular formula of Nitric acid?

  • HNO₂
  • HNO₃
  • HN₂O₂
  • H₂NO₄
0 Comments
Correct Answer: B. HNO₃

Explanation:

Nitric acid is a strong inorganic acid widely used in laboratories, chemical synthesis, ... Read More Details

6 Inorganic Chemistry MCQs

What is the molecular weight of Nitric acid (HNO₃)?

  • 63.012 g/mol
  • 65.012 g/mol
  • 70.012 g/mol
  • 81.011 g/mol
0 Comments
Correct Answer: A. 63.012 g/mol

Explanation:

The molecular formula of Nitric acid is HNO₃, consisting of 1 hydrogen atom ... Read More Details

7 Chemistry MCQs

The branch of chemistry that deals with brewing and distilling is called __________?

  • Zygology
  • Zymology
  • Zymurgy
  • Zootaxy
0 Comments
Correct Answer: C. Zymurgy

Explanation:

Zymurgy is the branch of chemistry that focuses on brewing, distilling, and fermentation-based ... Read More Details

8 Chemistry MCQs

The science of fermentation is called __________?

  • Zygology
  • Zymology
  • Zymurgy
  • Zootaxy
0 Comments
Correct Answer: B. Zymology

Explanation:

Zymology is the branch of science that deals with fermentation, a chemical process ... Read More Details

9 Physical Chemistry MCQs

The reciprocal of the coefficient of viscosity is called __________?

  • Density
  • Specific gravity
  • Fluidity
  • Absorbance
0 Comments
Correct Answer: C. Fluidity

Explanation:

In physical chemistry, the viscosity of a fluid measures its resistance to flow. ... Read More Details

10 Physical Chemistry MCQs

If the volume of a gas triples at constant temperature, what happens to its pressure?

  • 3P
  • P ÷ 3
  • 3P ÷ T
  • 6P
0 Comments
Correct Answer: B. P ÷ 3

Explanation:

According to Boyle’s Law, the pressure of a fixed mass of gas at ... Read More Details

Question Categories
General Knowledge Category MCQ'S
Computer Category MCQ'S
Chemistry Category MCQ'S
Pak Departmental Laws & Rules MCQs