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MCQs of Chemistry with Answers Free Preparation

For those preparing for initial tests in the Pakistan Army, Navy, or PAF, chemistry MCQs are not just a test of knowledge but also a test of analytical and problem-solving skills. Past candidates recommend using reliable resources, such as chemistry MCQ books, online practice tests, and PDF guides specifically tailored for military entry tests.

By dedicating time to practice and revision, candidates can gain confidence and improve their accuracy in answering chemistry questions. Ultimately, a strong performance in the chemistry section can significantly boost overall scores, bringing candidates one step closer to achieving their dreams of serving in the armed forces. Given MCQs f Chemistry are based on graduation level and best for commission jobs in Pak Navy and Army.

Online MCQs of Chemistry Free Preparation

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Chemistry Tests Quiz (Graduation Level)

1 / 25

Number of unpaired electrons in Cu2+ ions is:-

2 / 25

Which detection methods are used in IC:-

Conductivity detection

electrochemical detection

all of the above

atomic and molecular spectroscopic detection

3 / 25

What is one letter symbol for amino acid " Glutamine":-

4 / 25

Whcih of the following has the highest value of electronegativity:-

5 / 25

Which non covalent interaction is present in macromolecules:-

Van der Waals interaction

Hydrophobic interaction

H-bonds

All of above

6 / 25

When CH3COOH is titrated against NaOH, the pH at end point is:-

6.8

7 / 25

The amount of energy released by absorbing one electron in the valence shell is:-

Electron affinity

Lattice energy

Electronegativity

Ionization energy

8 / 25

Acetylation of fructose yields a:-

Diacetyl derivative

Pentacetyl derivative

Monodactyl derivative

Tetraethyl derivative

9 / 25

Which of the following are separated by froth Floatation process:-

Copper pyrite

Zinc blends

Galena

Al of the above

10 / 25

Among alkali metals the least metallic element is:-

11 / 25

The H2SO4 obtained by contact process having purity:-

82%

70%

78%

74%

12 / 25

What is the widely used electrical insulator:-

Polymer

plastics

epoxy

paper

13 / 25

Triton- 31 is an example of:-

anionic surfactants

non ionic surfactants

Cationic surfactants

none of the above

14 / 25

Which steps are involved in the primary treatment of waste water:-

All of above

Reduction in the size of trash and solid particles

Grit and scum removal

Sedementation

15 / 25

The spectroscopic region just above the region in which we can see:-

Visible

laser

infrared

16 / 25

Mutation rate in mitochondrial genome is:-

1000 times higher than nuclear genome

100 times higher than nuclear genome

10,000 times higher than nuclear genome

10 times higher than nuclear genome

17 / 25

The inert gases form_____ with certain organic molecules under pressure:-

Hydrates

Clathrates

All of above

Halides

18 / 25

Congenital adrenal hyperplasia can be detected by:-

ELISA

Southern blotting

Blotting methods

Northern Blotting

19 / 25

The method which is base on the exploitation of unique biological specificity of analyte and ligand interaction is called:-

Exclusion Chromatography

Partition Chromatography

Ion exchange Chromatography

Affibity Chromatography

20 / 25

Which element display the tendency to form pπ - pπ multiple bond with itself and with carbon and oxygen:-

21 / 25

The number of hydrogen bond holding A-T pair is:-

22 / 25

What is the purest form of Iron:-

Pig iron

steel

cast iron

Wrought iron

23 / 25

________ is preferred for horticulture crops and for tobacco and potatoes:-

potassium sulphate

none of these

potassium chloride

potassium nitrate

24 / 25

Configuration of carbohydrates relative to glyceraldehyde was suggested by:-

Rosanoff

Hirst

Howarth

Fischer

25 / 25

The most effective treatment for genetic disorder in the present time is:-

Genetic Counselling

Cloning

Gene Therapy

Gene mapping

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More Important MCQs of Chemistry Quiz Solved Past Experiences

1. What is the chemical formula of sodium bicarbonate?

A) Na₂CO₃
B) NaHCO₃
C) NaCl
D) NaOH

Correct Answer: B) NaHCO₃

2. Which of the following is an example of a homogeneous mixture?

A) Sand and water
B) Oil and water
C) Salt and water
D) Iron and sulfur

Correct Answer: C) Salt and water

3. Which of these elements is a transition metal?

A) Sodium
B) Copper
C) Oxygen
D) Chlorine

Correct Answer: B) Copper

4. The chemical formula of hydrochloric acid is:

A) H₂SO₄
B) HCl
C) HNO₃
D) H₂O

Correct Answer: B) HCl

5. Which of the following is a characteristic property of acids?

A) Bitter taste
B) Turns blue litmus paper red
C) Slippery to the touch
D) Produces a yellow flame when burned

Correct Answer: B) Turns blue litmus paper red

6. The process by which a solid turns directly into a gas is called:

A) Sublimation
B) Melting
C) Condensation
D) Evaporation

Correct Answer: A) Sublimation

7. What is the main gas responsible for the greenhouse effect?

A) Nitrogen
B) Carbon dioxide
C) Oxygen
D) Hydrogen

Correct Answer: B) Carbon dioxide

8. Which of the following elements is found in all organic compounds?

A) Nitrogen
B) Oxygen
C) Carbon
D) Hydrogen

Correct Answer: C) Carbon

9. The process of changing a liquid into a gas below its boiling point is called:

A) Evaporation
B) Boiling
C) Condensation
D) Freezing

Correct Answer: A) Evaporation

10. The compound NaOH is known as:

A) Sodium nitrate
B) Sodium carbonate
C) Sodium hydroxide
D) Sodium chloride

Correct Answer: C) Sodium hydroxide

11. Which of the following is not an alkali metal?

A) Lithium
B) Sodium
C) Potassium
D) Calcium

Correct Answer: D) Calcium

12. The process of converting a gas into a liquid is called:

A) Condensation
B) Evaporation
C) Freezing
D) Sublimation

Correct Answer: A) Condensation

13. The atomic number of an element is equal to the number of:

A) Protons
B) Electrons
C) Neutrons
D) Protons and neutrons

Correct Answer: A) Protons

14. What is the formula of ammonia?

A) NH₄
B) NH₃
C) N₂H₄
D) NH₂

Correct Answer: B) NH₃

15. Which of the following is a good conductor of electricity?

A) Wood
B) Glass
C) Copper
D) Plastic

Correct Answer: C) Copper

16. Which of the following is not a property of ionic compounds?

A) They conduct electricity in molten state
B) They have high melting and boiling points
C) They are generally soluble in water
D) They are poor conductors of electricity in solution

Correct Answer: D) They are poor conductors of electricity in solution

17. The most reactive non-metal is:

A) Fluorine
B) Chlorine
C) Oxygen
D) Nitrogen

Correct Answer: A) Fluorine

18. Which of the following is an example of a synthetic polymer?

A) Silk
B) Nylon
C) Cotton
D) Wool

Correct Answer: B) Nylon

19. Which of the following substances is a natural polymer?

A) Polystyrene
B) Nylon
C) Cellulose
D) PVC

Correct Answer: C) Cellulose

20. The process of breaking down large molecules into smaller ones by the use of heat or chemicals is called:

A) Polymerization
B) Condensation
C) Hydrolysis
D) Cracking

Correct Answer: D) Cracking

More Past Experiences MCQs of Chemistry with Answers

21. Which of the following is the main constituent of natural gas?

A) Methane
B) Ethane
C) Propane
D) Butane

Correct Answer: A) Methane

22. What is the name of the process by which a solid changes directly into a gas?

A) Freezing
B) Sublimation
C) Condensation
D) Melting

Correct Answer: B) Sublimation

23. Which of the following compounds is commonly used as a bleaching agent?

A) Sodium chloride
B) Hydrogen peroxide
C) Potassium nitrate
D) Sulfuric acid

Correct Answer: B) Hydrogen peroxide

24. What is the electronic configuration of oxygen (atomic number 8)?

A) 1s² 2s² 2p⁶
B) 1s² 2s² 2p⁴
C) 1s² 2s² 2p³
D) 1s² 2s¹ 2p⁶

Correct Answer: B) 1s² 2s² 2p⁴

25. Which of the following is an example of a heterogeneous mixture?

A) Saltwater
B) Air
C) Blood
D) Vinegar

Correct Answer: C) Blood

26. What is the boiling point of water at standard atmospheric pressure?

A) 100°C
B) 90°C
C) 0°C
D) 200°C

Correct Answer: A) 100°C

27. Which of the following is the most stable isotope of hydrogen?

A) Deuterium
B) Tritium
C) Protium
D) None of the above

Correct Answer: C) Protium

28. Which of the following gases is produced during the reaction between zinc and hydrochloric acid?

A) Nitrogen
B) Oxygen
C) Hydrogen
D) Carbon dioxide

Correct Answer: C) Hydrogen

29. Which of the following is the most electronegative element?

A) Sodium
B) Oxygen
C) Chlorine
D) Fluorine

Correct Answer: D) Fluorine

30. What type of bond is formed when electrons are shared between two atoms?

A) Ionic bond
B) Covalent bond
C) Metallic bond
D) Hydrogen bond

Correct Answer: B) Covalent bond

31. Which of the following is a property of metals?

A) Poor conductors of heat
B) Brittle
C) Malleable
D) Do not conduct electricity

Correct Answer: C) Malleable

32. The atomic mass of an element is the sum of:

A) The number of electrons and protons
B) The number of protons and neutrons
C) The number of protons and electrons
D) The number of neutrons and electrons

Correct Answer: B) The number of protons and neutrons

33. Which of the following substances is commonly used to make soap?

A) Sodium chloride
B) Sodium hydroxide
C) Potassium chloride
D) Sodium carbonate

Correct Answer: B) Sodium hydroxide

34. What is the name of the compound with the formula Na₂SO₄?

A) Sodium sulfate
B) Sodium sulfide
C) Sodium sulfite
D) Sodium sulfate tetrahydrate

Correct Answer: A) Sodium sulfate

35. The chemical reaction between an acid and a base results in the formation of:

A) Salt and water
B) Salt and hydrogen gas
C) Oxygen and water
D) Oxygen and hydrogen

Correct Answer: A) Salt and water

36. Which of the following elements is most commonly found in the Earth’s crust?

A) Oxygen
B) Carbon
C) Nitrogen
D) Hydrogen

Correct Answer: A) Oxygen

37. Which of the following compounds is commonly used as a disinfectant?

A) Ammonia
B) Hydrogen peroxide
C) Sodium chloride
D) Methane

Correct Answer: B) Hydrogen peroxide

38. What is the formula for the compound formed between calcium (Ca) and chlorine (Cl)?

A) CaCl
B) CaCl₂
C) Ca₂Cl
D) Ca₂Cl₃

Correct Answer: B) CaCl₂

39. Which of the following substances is a good example of a non-metal?

A) Oxygen
B) Iron
C) Copper
D) Magnesium

Correct Answer: A) Oxygen

40. The boiling point of a liquid is the temperature at which:

A) The liquid starts freezing
B) The liquid begins to evaporate
C) The liquid starts to boil and turn into gas
D) The liquid condenses into a solid

Correct Answer: C) The liquid starts to boil and turn into gas

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