Chemistry MCQs with answers Page - 150

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following is used in photography?

  • (A) Silver bromide
  • (B) Sodium chloride
  • (C) Calcium sulfate
  • (D) Magnesium oxide

S

Shyam Dubey • 3.70K Points
Extraordinary

Q. Which gas is produced during photosynthesis?

  • (A) Carbon dioxide
  • (B) Nitrogen
  • (C) Oxygen
  • (D) Hydrogen

A

Admin • 833.24K Points
Coach

Q. The atomic number of carbon is:

  • (A) 4
  • (B) 6
  • (C) 8
  • (D) 12

A

Admin • 833.24K Points
Coach

Q. The pH of a neutral solution at 25°C is:

  • (A) 0
  • (B) 5
  • (C) 7
  • (D) 14

A

Admin • 833.24K Points
Coach

Q. Which gas is evolved when zinc reacts with dilute hydrochloric acid?

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

A

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Q. The SI unit of amount of substance is:

  • (A) Gram
  • (B) Kilogram
  • (C) Mole
  • (D) Molar

A

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Coach

Q. Which of the following is an alkali metal?

  • (A) Magnesium
  • (B) Calcium
  • (C) Sodium
  • (D) Aluminium

A

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Q. Avogadro's number is:

  • (A) 6.022 × 10²¹
  • (B) 6.022 × 10²²
  • (C) 6.022 × 10²³
  • (D) 6.022 × 10²⁴

A

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Q. The oxidation state of oxygen in H₂O₂ is:

  • (A) -2
  • (B) -1
  • (C) 0
  • (D) +1

A

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Q. The molecular formula of methane is:

  • (A) CH₃
  • (B) CH₄
  • (C) C₂H₄
  • (D) C₂H₆

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