Chemistry MCQs with answers Page - 7

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Q. The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is

  • (A) carbon
  • (B) hydrogen
  • (C) oxygen
  • (D) nitrogen

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Q. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is

  • (A) chain isomerism
  • (B) functional group isomerism
  • (C) positional isomerism
  • (D) metamerism

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Q. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

  • (A) 1/6
  • (B) 1/3
  • (C) 1/8
  • (D) 1/4

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Q. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3

  • (A) 4
  • (B) 5
  • (C) 2
  • (D) 0

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Q. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in

  • (A) 1.8 gram of H2O
  • (B) 12 moles of KMnO4
  • (C) 0.6N H2SO4
  • (D) 4.6 gram of C2H5OH

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Q. Water is not suitable as a calorimetric substance because it :

  • (A) has high specific heat
  • (B) is a good conductor
  • (C) has high boiling point
  • (D) low latent heat of vaporization

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Q. Benzene cannot undergo :

  • (A) Substitution
  • (B) Addition
  • (C) Elimination
  • (D) Oxidation

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Q. Which among the following is found in chlorophyll ?

  • (A) Ca2+
  • (B) Mg2+
  • (C) Fc2+
  • (D) Al3+

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Q. The polymer obtained by the condensation of hexamethylene diamine and adipic acid is :

  • (A) Nylon 66
  • (B) Terylene
  • (C) Tollen’s
  • (D) Bankelite

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Q. What is the chemical name of vinegar -

  • (A) Pyruvic acid
  • (B) Citric acid
  • (C) Malic acid
  • (D) Acetic acid

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