Chemistry Mcqs

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This collection of Chemistry MCQs is a comprehensive resource designed to aid candidates preparing for competitive exams such as those conducted by the Institute of Business Administration (IBA), National Testing Service (NTS), and for various government jobs across scales 5 to 15. The questions span a wide range of topics within chemistry, including the fundamentals of chemical composition and properties, atomic structure, chemical bonding, thermodynamics, and more. Each question is carefully selected based on its frequency in past exams, offering a strategic overview of the subjects that are critical for success. The answers are provided alongside the questions, making it easier for learners to check their understanding and review concepts that are essential for high-stakes testing environments. This compilation not only serves as a valuable tool for revision but also helps in enhancing problem-solving speed and accuracy, which are crucial for excelling in competitive exams.



Chemistry Mcqs

Most repeated MCQs for IBA &NTS

For preparation of 5 to 15 scale 


1) The soul of chemistry is dealing with___________?


A. Internal structural changes in matter

B. Composition of matter

C. Properties of matter

D. Composition and properties of matter

Ans :d



2)The radioactive isotope of hydrogen is called___________?


A. tritium                    B. deuterium

C. protium                  D. ortho-hydrogen

Ans :a


3) Electron was discovered by?


A. Michael Faraday.              B. James Maxwell

C. Yuri Gagarin .                    D. J.J Thomson

Ans :d


4) Sodium carbonate is produced by____________?


A. haber process      B. Amonia solvay process

C. decons process .   D. lead chamber process

Ans :b


5) Which of the following is a substance?


A. Sea water                B. Brass

C. Tape water              D. Graphite

Ans :d


6)Diameter of an atom is in the order of________________?


A. 0.2m                     B. 0.2mm

C. 0.2nm                   D. 0.2pm

Ans :c


7) Empirical formula of chloroform is____________________?


A. CH2 C12                 B. CH3C1

C. CC14 .                      D. CHCL3

Ans :d



8)Molecular mass of water (18g) means__________________?


A. 1-mole molecules of water

B. 1-gram molecule of water

C. 3-gram atoms

D. all

Ans :d



9)One mole of CO2 contains?


A. 6.022 x 1023 atoms of oxygen

B. 22 electrons

C. 6.022 x 1023 atoms of carbon

D. both B. & C

Ans :d



10) Which of the following terms is not used for ionic compound ?


A. formula unit .              B. empirical formula

C. molecular formula .   D. formula mass

Ans :c



11) Which one of the following has the maximum number of isotopes ?


A. oxygen             B.carbon

C. tin                     D. chlorine

Ans :c


12) How many isotopes have odd atomic number ?


A. 154                   B. 280

C. 86                      D. 300

Ans :c


13)Which of the following is not a macromolecule ?


A. sand                           B. haemoglobin

C. diamond                     D. maltose

Ans :d


14) 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

Ans :a


15)Which one is true about isotope ?


A. Same number of neutrons

B. Same mass number

C. Same physical properties

D. Same chemical properties

Ans :d


16)Size of molecule depends upon________________?


A. Atomicity                        B. Shape of molecule

C. Both A and B                  D. Difficult to predict

Ans :c



17) Isotopes differ in_________________?


A. properties which depend upon mass

B. arrangement of electrons in orbitals

C. chemical properties

D. all of the above

Ans :a


18) The nucleus of an atom of every element will always contain____________________?


A. neutrons              B. protons and electrons

C. protons                 D. protons and neutrons

Ans :c


19) The hardest of the following solids is__________________?


A. sodium                   B. diamond

C. graphite                 D. magnesium

Ans :b


20) Which of the solid does not contain covalent bond__________________?


A. copper                    B. ice

C. diamond                D. graphite

Ans :a


21) Which of the following is the formula of chrome red ?


A. Pb3 O4                                    B. 2Pb CO3 – Pb (OH)2

C. Pb Cr O4 – Pb (OH)2             D. Pb2O

Ans :a



22)Benzene is a good solvent for__________________?


A. fats                           B. resins

C. iodine.                      D. all the above

Ans :d



23) Which of the following element doesnot show allotropy_________________?


A. Carbon.                 B. Arsenic

C. Nitrogen                D. Sulphur

Ans :c



24)In solids the temperature is the measure of__________________?


A. Average kinetic energy of molecules

B. Vibrational kinetic energy

C. Translational kinetic energy

D. None of the above

Ans :b



25) The unit of molality is__________________?


A. moles dm-3                  B. moles kg-1

C. gram dm-3                    D. none

Ans :b



26) A solution can be both____________________?


A. dilute and concentrated 

B. dilute and saturated

C. saturated and unsaturated

D. saturated and super saturated

Ans :a



27)The molecules of CO2 in dry ice form__________________?


A. Ionic crystal.               B. Covalent crystal

C. Molecular crystal       D. Any type of crystal

Ans :c



28) Which of the following can be used in laptops ?


A. Silver oxide battery.         B. Fuel cell

C. Nickel cadmium cell   D. Lead accumulator

Ans :c




29)Which one of the following looks odd__________________?


A. H2SO4.                 B. KMnO4

C. H2S                       D. K2CrO4

Ans :c



30) Which of the following is not a fatty acid ?

A. Propanoic acid             B. Acetic acid

C. Phthalic acid .               D. Butanoic acid

Ans :c





1)d 

2) a

3) d

4) b

5)d

6) c

7) d

8) d

9) d

10)c

11) c

12)c

13) d

14)a

15) d

16) c

17)a

18) c

19) b

20) a

21)a

22) d

23)b

24)b

25) a

26) c

27) c

28) c

29) c

30)c



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