Matter's Purity MCQ Quiz – Part 4
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This Matter’s Purity MCQ Quiz helps aspirants revise important concepts related to pure substances, mixtures, and methods of separation, which are frequently asked in competitive exams. Regular practice of matter’s purity MCQs improves conceptual understanding and helps candidates answer chemistry questions quickly and accurately.
GK Series – Chemistry – Matter’s Purity MCQ Quiz |
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| Subject | Chemistry |
| Chapter | Matter’s Purity |
| Part | 4 |
| Questions | 25 |
Who Should Attempt This Matter’s Purity MCQ Quiz?
This Matter’s Purity MCQ Quiz is useful for aspirants preparing for SSC, Railways, Defence, and other government job exams, where basic chemistry questions are commonly asked in the General Knowledge section.
Topics Covered in This Matter’s Purity MCQ Quiz
This quiz includes MCQs based on important topics such as elements, compounds, mixtures, homogeneous and heterogeneous mixtures, solutions, suspensions, colloids, and methods of separation like filtration, distillation, and evaporation, along with other fundamental concepts related to purity of matter.
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Question 1 of 25
1. Question
Which method is used to separate camphor from sand?
Correct
➤ Camphor sublimes.
➤ Leaves sand behind.Incorrect
➤ Camphor sublimes.
➤ Leaves sand behind. -
Question 2 of 25
2. Question
Which method is used to obtain pure copper sulphate crystals?
Correct
➤ Crystallisation purifies solids.
Incorrect
➤ Crystallisation purifies solids.
-
Question 3 of 25
3. Question
Mass % of a solution is calculated by
Correct
➤ Mass % = (solute / solution) × 100.
Incorrect
➤ Mass % = (solute / solution) × 100.
-
Question 4 of 25
4. Question
Calculate mass % of solution with 40g solute in 360g solution
Correct
➤ (40/360) ×100 = 11.11%.
Incorrect
➤ (40/360) ×100 = 11.11%.
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Question 5 of 25
5. Question
Which of the following is used to separate components of air?
Correct
➤ Air components separated by fractional distillation.
➤ Based on boiling points.Incorrect
➤ Air components separated by fractional distillation.
➤ Based on boiling points. -
Question 6 of 25
6. Question
A change in which no new substance is formed is called
Correct
➤ Physical change does not form new substance.
➤ Only physical properties change.Incorrect
➤ Physical change does not form new substance.
➤ Only physical properties change. -
Question 7 of 25
7. Question
A change in which new substance is formed is called
Correct
➤ Chemical change forms new substances.
➤ Permanent change.Incorrect
➤ Chemical change forms new substances.
➤ Permanent change. -
Question 8 of 25
8. Question
Which of the following is a physical change?
Correct
➤ Melting is reversible.
➤ No new substance formed.Incorrect
➤ Melting is reversible.
➤ No new substance formed. -
Question 9 of 25
9. Question
Which of the following is a chemical change?
Correct
➤ Burning produces new substances.
➤ Irreversible.Incorrect
➤ Burning produces new substances.
➤ Irreversible. -
Question 10 of 25
10. Question
Which of the following is reversible?
Correct
➤ Physical changes are usually reversible.
Incorrect
➤ Physical changes are usually reversible.
-
Question 11 of 25
11. Question
Which of the following is irreversible?
Correct
➤ Chemical changes are irreversible.
Incorrect
➤ Chemical changes are irreversible.
-
Question 12 of 25
12. Question
Burning of candle involves
Correct
➤ Wax melts (physical) + burns (chemical).
Incorrect
➤ Wax melts (physical) + burns (chemical).
-
Question 13 of 25
13. Question
Brownian motion is
Correct
➤ Brownian motion = random movement.
➤ Due to particle collision.Incorrect
➤ Brownian motion = random movement.
➤ Due to particle collision. -
Question 14 of 25
14. Question
Brownian motion was discovered by
Correct
➤ Discovered by Robert Brown (1827).
Incorrect
➤ Discovered by Robert Brown (1827).
-
Question 15 of 25
15. Question
Brownian motion occurs due to
Correct
➤ Continuous collision causes motion.
➤ Random movement.Incorrect
➤ Continuous collision causes motion.
➤ Random movement. -
Question 16 of 25
16. Question
Which of the following correctly defines a compound?
Correct
➤ Compound = elements chemically combined in fixed ratio.
➤ Example: H₂O.Incorrect
➤ Compound = elements chemically combined in fixed ratio.
➤ Example: H₂O. -
Question 17 of 25
17. Question
Which of the following is NOT a property of a solution?
Correct
➤ Solutions do NOT show Tyndall effect.
➤ Light passes without scattering.Incorrect
➤ Solutions do NOT show Tyndall effect.
➤ Light passes without scattering. -
Question 18 of 25
18. Question
Which of the following correctly matches mixture type and property?
Correct
➤ Suspension particles settle down.
➤ Due to large size.Incorrect
➤ Suspension particles settle down.
➤ Due to large size. -
Question 19 of 25
19. Question
Which of the following mixtures cannot be separated by filtration?
Correct
➤ Solution particles pass through filter.
➤ Cannot be filtered.Incorrect
➤ Solution particles pass through filter.
➤ Cannot be filtered. -
Question 20 of 25
20. Question
Which of the following correctly represents the order of particle size?
Correct
➤ Particle size: Suspension > Colloid > Solution.
Incorrect
➤ Particle size: Suspension > Colloid > Solution.
-
Question 21 of 25
21. Question
Fractional crystallisation is used to separate substances based on
Correct
➤ Fractional crystallisation works on solubility difference.
➤ Less soluble substance crystallizes first.Incorrect
➤ Fractional crystallisation works on solubility difference.
➤ Less soluble substance crystallizes first. -
Question 22 of 25
22. Question
In a colloid, the solute-like particles are called
Correct
➤ Dispersed phase = colloidal particles.
➤ Similar to solute.Incorrect
➤ Dispersed phase = colloidal particles.
➤ Similar to solute. -
Question 23 of 25
23. Question
Solubility of gases in liquids increases when
Correct
➤ Lower temperature → higher gas solubility.
Incorrect
➤ Lower temperature → higher gas solubility.
-
Question 24 of 25
24. Question
Which of the following is correct about mixtures and compounds?
Correct
➤ Compound = fixed ratio.
➤ Mixture = variable composition.Incorrect
➤ Compound = fixed ratio.
➤ Mixture = variable composition. -
Question 25 of 25
25. Question
Which of the following correctly represents Element, Compound, and Homogeneous mixture?
Correct
➤ Iron = element
➤ Salt = compound
➤ Sea water = homogeneous mixtureIncorrect
➤ Iron = element
➤ Salt = compound
➤ Sea water = homogeneous mixture