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Nature and Composition of Matter

26 MCQ questions with answers and explanations · page 1 of 2

Test yourself▶ 25 question test

Q1. "Every substance in the universe is made up of extremely tiny particles." Who first said this?

  1. ADalton
  2. BKanada
  3. CRutherford
  4. Dby avocado
Show answer & explanation

Answer: B) Kanada

Q2. In which of the following is a single type of atom found?

  1. AMineral compounds
  2. BMineral mixture
  3. Cnatural elements
  4. DNone of these
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Answer: C) natural elements

Q3. Which one of the following is an element?

  1. Aruby
  2. BSapphire
  3. CEmerald
  4. DDiamond
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Answer: D) Diamond

Q4. What is a 'pure element'?

  1. Aglass
  2. Bcement
  3. Csodium
  4. DSand
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Answer: C) sodium

Q5. Coal is

  1. AElement
  2. Bcompound
  3. Cmixture
  4. Dliquid
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Answer: A) Element

Q6. 'Diamond' is-

  1. AElement
  2. Bcompound
  3. Cmixture
  4. Dliquid
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Answer: A) Element

Q7. A substance formed by combining two or more elements in a definite proportion in terms of quantity is called-

  1. AElement
  2. Bcompound
  3. Cmixture
  4. DSolid
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Answer: B) compound

Q8. Which of the following statements is not correct about compounds?

  1. AThe combination of substances in a compound is indefinite.
  2. BComponents can only be separated by chemical or electrochemical reactions
  3. CElements react to form new compounds
  4. DThe composition of each new substance is always determined
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Answer: A) The combination of substances in a compound is indefinite.

Q9. Which of the following is a 'compound'?

  1. ASteel
  2. BBrass
  3. CSand
  4. DDiamond
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Answer: C) Sand

Q10. Which of the following is a 'compound'?

  1. AMercury
  2. Bozone
  3. CAir
  4. Dammonia
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Answer: D) ammonia

Q11. Which of the following is a 'chemical compound'?

  1. AAir
  2. Boxygen
  3. Cammonia
  4. DMercury
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Answer: C) ammonia

Q12. Which of the following is a compound?

  1. AAir
  2. BMercury
  3. Cozone
  4. DWater
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Answer: D) Water

Q13. Water is a compound because-

  1. AIt is found in all three forms – solid, liquid and gas.
  2. BIt contains hydrogen and oxygen
  3. CIt consists of two different elements joined by chemical bonds
  4. DIt can be broken down into two simpler substances by chemical means.
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Answer: C) It consists of two different elements joined by chemical bonds

Q14. Bleaching Powder is-

  1. AElement
  2. Bcompound
  3. Cmixture
  4. Dallotrope
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Answer: B) compound

Q15. Mixing two or more pure substances in any ratio forms -

  1. AElement
  2. Bcompound
  3. Cmixture
  4. Dgas
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Answer: C) mixture

Q16. Which one of the following is not a mixture?

  1. Agraphite
  2. Bglass
  3. CBrass
  4. Dsteel
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Answer: A) graphite

Q17. Which of the following substances is not a mixture?

  1. ATin
  2. Bsea water
  3. Csoil
  4. DAir
Show answer & explanation

Answer: A) Tin

Q18. Which of the following is neither an element nor a compound?

  1. AAir
  2. BWater
  3. CMercury
  4. DSalt
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Answer: A) Air

Q19. Stainless steel is an alloy, whereas 'air' is a-

  1. Amixture
  2. Bcompound
  3. CElement
  4. DMerger
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Answer: A) mixture

Q20. Which of the following is 'Vayu'?

  1. AElement
  2. Bcompound
  3. Cmixture
  4. Dliquid
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Answer: C) mixture

Q21. gunpowder is

  1. AElement
  2. Bcompound
  3. Cmixture
  4. Dliquid
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Answer: C) mixture

Q22. Which of the following processes is not useful for purification of solid impurities?

  1. Adistillation
  2. Bsublimation
  3. CCrystallization
  4. DAll these
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Answer: A) distillation

Q23. A mixture of sodium chloride and ammonium chloride can be separated by

  1. Asublimation
  2. BNisyanvan
  3. Cchromatography
  4. Ddistillation
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Answer: A) sublimation

Q24. Which of the following substances does not contain oxygen?

  1. Acement
  2. BSand
  3. Ckerosene oil
  4. Dglass
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Answer: C) kerosene oil

Q25. Which substance is found in three states (solid, liquid and gas) in nature?

  1. AH₂O
  2. BH₂O₂
  3. CNH₃
  4. DSO₂
Show answer & explanation

Answer: A) H₂O

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