Chemistry MCQs with answers Page - 139

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which metal is used in galvanization?

  • (A) Zinc
  • (B) Copper
  • (C) Iron
  • (D) Silver

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following represents a redox reaction?

  • (A) NaOH + HCl → NaCl + H2O
  • (B) Zn + 2HCl → ZnCl2 + H2
  • (C) AgNO3 + NaCl → AgCl + NaNO3
  • (D) BaCl2 + H2SO4 → BaSO4 + 2HCl

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which allotrope of carbon is the hardest natural substance?

  • (A) Graphite
  • (B) Charcoal
  • (C) Diamond
  • (D) Fullerene

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Shyam Dubey • 3.70K Points
Extraordinary

Q. What is the main constituent of natural gas?

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

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Shyam Dubey • 3.70K Points
Extraordinary

Q. What is the oxidation state of sulfur in H2SO4?

  • (A) +2
  • (B) +4
  • (C) +6
  • (D) 0

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following is the lightest gas?

  • (A) Oxygen
  • (B) Hydrogen
  • (C) Nitrogen
  • (D) Helium

S

Shyam Dubey • 3.70K Points
Extraordinary

Q. What is the pH of pure water at 25°C?

  • (A) 6
  • (B) 7
  • (C) 8
  • (D) 9

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following elements is a noble gas?

  • (A) Nitrogen
  • (B) Oxygen
  • (C) Helium
  • (D) Hydrogen

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which acid is commonly found in vinegar?

  • (A) Citric acid
  • (B) Acetic acid
  • (C) Sulphuric acid
  • (D) Formic acid

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following is an example of a chemical change?

  • (A) Melting of ice
  • (B) Boiling of water
  • (C) Rusting of iron
  • (D) Breaking of glass

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