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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

Magnesium burns in air to give:-

MgO

MgCO3

Mg3N2

Both a, c

2 / 25

Which disaccharide is not a plant product:-

None

Sucrose

Maltose

Lactose

3 / 25

Which mixture does not act as a buffer:-

sodium chloride/hydrochloric acid

Phosphoric acid/sodium phosphate

Acetic acid/sodium acetate

Trisbase/HCl

4 / 25

Excision and insertion of a gene from one organism to the other is called____:-

Genetic engineering

Gene therapy

Biotechnology

Cytogenetics

5 / 25

Granulated sugar contains ___% of sucrose:-

99.93

6 / 25

Which of the following has maximum vapor pressure:-

HBr

HCl

7 / 25

Which mechanism is used in GSC technique:-

size exclusion

Sorption

Adsorption

partition

8 / 25

Number of unpaired electrons in Cu2+ ions is:-

9 / 25

Synthesis gas is a mixture of:-

Co & CH4

Co2 & H2

Co & H2

CO2 & N2

10 / 25

Which redox couple directly react with oxygen:-

FADH2

Complex V

Cytochrome C

Cytochrome a3

11 / 25

Lime water is an aqueous solution of:-

CaCO3

CaSO4

Ca(OH)2

MgSO4

12 / 25

AUG, the only identified codon for methionine is important as:-

None of these

A chain initiating codon

A chain terminating codon

Both of these

13 / 25

Pyroxlin is:-

Mixture of cellulose mono and di acetate

Cellulose triacetate

Cellulose trinitrate

Mixture of cellulose mono and dinitrate

14 / 25

Which technique is used to reduce the need for large volume of organic solvent:-

TLC

solid phase extraction

Gel permeation

electrophoresis

15 / 25

The gaseous mixture of N2O and O2 is used as:-

Oxidizing agent

Anesthetic

Fuel

Reducing agent

16 / 25

Granulated sugar contains:-

maltose

sucrose

glucose

fructose

17 / 25

Which is the strongest reducing agent:-

HCl

HBr

18 / 25

The coordination centre for the endocrine system is:-

The liver

The adrenal glands

The hypothalamus

The pituitary

19 / 25

Gregor Mendel conducted the first genetic experiment by using;-

Bt cotton

Pea plant

Yeast

Bt corn

20 / 25

In which form is glucose liberated from glycogen:-

UDP-glucose

Glucose-1-phosphate

All of the above

Glucose-6-phosphate

21 / 25

In smelting process ore is mixed with:-

Limestone

Silica

All

Coke

22 / 25

Buckminster fullerenes is:-

C50

C76

C36

C60

23 / 25

The process of addition of phosphoric acid and lime to hot juice is called:-

sulphitation

phosphatation

Filtration

defecation

24 / 25

Which of the following has the maximum tendency to form complexes:-

25 / 25

Which metal exhibit more than one oxidation state:-

Your score is

The average score is 0%

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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