MCQs of Chemistry Free Preparation
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…
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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More Important MCQs of Chemistry Quiz Solved Past Experiences
1. What is the chemical formula of sodium bicarbonate?
A) NaโCOโ
B) NaHCOโ
C) NaCl
D) NaOH
Correct Answer: B) NaHCOโ
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) HโSOโ
B) HCl
C) HNOโ
D) HโO
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) NHโ
B) NHโ
C) NโHโ
D) NHโ
Correct Answer: B) NHโ
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) 1sยฒ 2sยฒ 2pโถ
B) 1sยฒ 2sยฒ 2pโด
C) 1sยฒ 2sยฒ 2pยณ
D) 1sยฒ 2sยน 2pโถ
Correct Answer: B) 1sยฒ 2sยฒ 2pโด
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) 100ยฐC
B) 90ยฐC
C) 0ยฐC
D) 200ยฐC
Correct Answer: A) 100ยฐC
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 NaโSOโ?
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) CaClโ
C) CaโCl
D) CaโClโ
Correct Answer: B) CaClโ
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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