Chemistry MCQs

Explore an extensive collection of Chemistry MCQs covering all key topics of Chemistry Mcqs are including organic chemistry, inorganic chemistry, physical chemistry, atomic structure, chemical bonding, stoichiometry, thermodynamics, kinetics, acids and bases, periodic table, and more. Perfect for students preparing for board exams, competitive tests, and university-level assessments in Pakistan

Chemistry MCQs

Which of the following terms is used for the mass of chlorine 35.5 ?

A. relative atomic mass

B. mass number

C. atomic weight

D. relative isotopic mass

Size of molecule depends upon________________?

A. Atomicity

B. Shape of molecule

C. Both A and B

D. Difficult to predict

Avogadros number may represent_________________?

A. volume of particles

B. number of particles

C. mass of particles

D. All of the above

The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer_________________?

A. Gas

B. Liquid

C. Volatile solid

D. All

Which of the following ion formation is always exothermic ?

A. Uni-negative

B. Uni-positive

C. Di-negative

D. Di-positive

Which one is true about isotope ?

A. Same number of neutrons

B. Same mass number

C. Same physical properties

D. Same chemical properties

Molecular ions are formed by passing______________________?

A. High energy electron beam

B. ? – particle

C. X-rays

D. All of the above

Which of the following are isoelectronic species ?

A. H+ H H-

B. Li+ Na+ K+

C. C1- Br- I

D. F- Ne Na+

1 a.m.u =__________________?

A. 1.6 x 10-27 kg

B. 1.6 x 10-24 kg

C. 1.6 x 10-26 kg

D. 1.6 x 10-28 kg

The properties of an element mosly corresponds to that isotope which has greater_________________?

A. Mass number

B. Atomic mass

C. Relative abundance

D. all of the above

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