Chemistry MCQs with answers Page - 143

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following is a mixture?

  • (A) Water
  • (B) Air
  • (C) Salt
  • (D) Glucose

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which element is the main constituent of the sun?

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

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following is an example of an alloy?

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

S

Shyam Dubey • 3.70K Points
Extraordinary

Q. Which gas is responsible for the depletion of the ozone layer?

  • (A) Carbon dioxide
  • (B) CFCs
  • (C) Methane
  • (D) Nitrogen

S

Shyam Dubey • 3.70K Points
Extraordinary

Q. Which metal is the best conductor of electricity?

  • (A) Copper
  • (B) Silver
  • (C) Gold
  • (D) Aluminium

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following processes is used to purify water?

  • (A) Filtration
  • (B) Evaporation
  • (C) Distillation
  • (D) All of these

S

Shyam Dubey • 3.70K Points
Extraordinary

Q. What is the chemical name of washing soda?

  • (A) Sodium carbonate
  • (B) Sodium chloride
  • (C) Sodium hydroxide
  • (D) Sodium bicarbonate

S

Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following acids is found in lemon?

  • (A) Formic acid
  • (B) Citric acid
  • (C) Tartaric acid
  • (D) Lactic acid

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which element has the chemical symbol 'K'?

  • (A) Calcium
  • (B) Krypton
  • (C) Potassium
  • (D) Phosphorus

S

Shyam Dubey • 3.70K Points
Extraordinary

Q. What is the main component of natural gas?

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

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