Chemistry Questions Answers

• 43. The nuclear particles which are assumed to hold the nucleons together are ?

  1. positrons
  2. neutrons
  3. electrons
  4. mesons

  Answer And Explanation

  Answer: Option D

  Explanation:

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• 44. The metal that is used as a catalyst in the hydrogenation of oils is ?

  1. Pb
  2. Ni
  3. Cu
  4. Pt

  Answer And Explanation

  Answer: Option B

  Explanation:

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• 45. The most abundant element in the earth's crust is ?

  1. Aluminium
  2. Nitrogen
  3. Silicon
  4. Oxygen

  Answer And Explanation

  Answer: Option D

  Explanation:

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• 46. The most abundant rare gas in the atmosphere is ?

  1. He
  2. Ne
  3. Ar
  4. Xe

  Answer And Explanation

  Answer: Option C

  Explanation:

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• 47. The ore which is found in abundance in India is

  1. monazite
  2. bauxite
  3. magnetite
  4. fluorspar

  Answer And Explanation

  Answer: Option A

  Explanation:

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• 48. The luster of a metal is due to :

  1. high polishing
  2. high density
  3. chemical inertness
  4. presence of free electrons

  Answer And Explanation

  Answer: Option D

  Explanation:

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• 49. The most malleable metal is

  1. platinum
  2. silver
  3. gold
  4. iron

  Answer And Explanation

  Answer: Option C

  Explanation:

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