Chemistry MCQs with answers Page - 47

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Q. Which of the following is the maximum number of electrons that can be present in M-shell?

  • (A) 2
  • (B) 8
  • (C) 18
  • (D) 32

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Q. Atoms of different elements have

  • (A) Same atomic number and same electronic configuration
  • (B) Different atomic number and same eletronic configu-ration
  • (C) Different atomic number and different number of valence electrons
  • (D) Same number of electrons and neutrons

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Q. The most abundant rare gas in the atmosphere is

  • (A) Ar
  • (B) Ne
  • (C) He
  • (D) Xe

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Q. LPG consists of mainly

  • (A) Methane, hexane and nonane
  • (B) Methane, ethane and hexane
  • (C) Methane, butane and propane
  • (D) Ethane, hexane and nonane

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Q. Tetraethyl lead is used as

  • (A) Pain killer
  • (B) Fire extinguisher
  • (C) Petrol additive
  • (D) Mosquito repellent

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Q. The main chemical constituent of clay is

  • (A) Zeolites
  • (B) Silicon oxide
  • (C) Aluminium borosilicate
  • (D) Aluminium silicate

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Q. In which of the following activities silicon carbide is used?

  • (A) Disinfecting water of ponds
  • (B) Cutting very hard substances
  • (C) Making casts for statues
  • (D) Making cement and glass

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Q. Monazite is an ore of

  • (A) Zirconium
  • (B) Thorium
  • (C) Titanium
  • (D) Iron

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Q. Glass is made of the mixture of

  • (A) Quartz and mica
  • (B) Sand and silicates
  • (C) Sand and salt
  • (D) Salt and quartz

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Q. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

  • (A) Xenon
  • (B) Helium
  • (C) Krypton
  • (D) Argon

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