Chemistry MCQs with answers Page - 9

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Q. Who among the following demonstrated experimentally that simple organic molecules like sugars and amino acids could be produced from inorganic molecules if early earth atmosphere is created

  • (A) A.I. Oparin
  • (B) Donald Brown
  • (C) Oscar Miller
  • (D) Stanley Miller

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Q. Which of the following rays are produced when very high energy electrons are stopped suddenly at a metal target?

  • (A) a-rays
  • (B) g-rays
  • (C) X-rays
  • (D) b-rays

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Q. Currency coins are alloys of different metals. One metal that is present in all coins is

  • (A) gold
  • (B) zinc
  • (C) silver
  • (D) copper

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Q. A common fluorescent tube contains

  • (A) sodium vapour
  • (B) mercuric oxide and neon
  • (C) argon at low pressure
  • (D) mercury vapour at low pressure

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Q. The ammonium ion is

  • (A) Square pyramidal
  • (B) Tetrahedral
  • (C) Square planar
  • (D) Trigonal pyramidal

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Q. The materials used in the manufacture of glass are
1.sand (silica)
2.soda ash (sodium carbonate)
3.common salt (sodium chloride)
4.lime stone (calcium carbonate) Select the correct answer by using the code below,

  • (A) 1, 2, 3 and 4
  • (B) 1, 2 and 4 only
  • (C) 1, 2 and 3 only
  • (D) 2, 3 and 4 only

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Q. Chlorine is not used in the preparation of

  • (A) Phosgene
  • (B) Hydrochloric acid
  • (C) Phosphine
  • (D) Bleaching powder

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Q. Blister copper is

  • (A) pure copper
  • (B) an alloy of copper
  • (C) an ore of copper
  • (D) impure copper

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Q. The different isotopes of an element have the same
I. Atomic mass
II. Atomic number
III. Arrangement of orbital electrons
The correct statement(s) is/are:

  • (A) II and III only
  • (B) I and II only
  • (C) II only
  • (D) I, II and III

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