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CHEMISTRY MCQs

Total Questions : 2589 | Page 7 of 259 pages
Question 61. Percentage of lead in lead pencils is
  1.    0
  2.    31-66
  3.    40
  4.    80
 Discuss Question
Answer: Option A. -> 0
Question 62. The major use of sulphur is in the manufacture of
  1.    H2SO4
  2.    H2S
  3.    SO2
  4.    Fungicide
 Discuss Question
Answer: Option A. -> H2SO4
Question 63. 0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by
  1.    3
  2.    4
  3.    6
  4.    7
 Discuss Question
Answer: Option B. -> 4
Question 64. Which of the following methods is used in determining the number average molar mass of a macromolecule?
  1.    Viscosity
  2.    Osmotic pressure
  3.    Sedimentation equilibrium
  4.    Light scattering
 Discuss Question
Answer: Option B. -> Osmotic pressure
Question 65. A solution is
  1.    A homogeneous mixture of two or more substances
  2.    A solid dissolved in a liquid
  3.    A solid dissolved i water
  4.    A mixture of two liquids
 Discuss Question
Answer: Option A. -> A homogeneous mixture of two or more substances
Question 66. Molality of pure water is
  1.    18.00
  2.    1.80
  3.    5.55
  4.    55.5
 Discuss Question
Answer: Option D. -> 55.5
Question 67. Which one is the most dense liquid from the below?
  1.    Water
  2.    Choloform
  3.    Gasolin
  4.    None of the above
 Discuss Question
Answer: Option B. -> Choloform
Question 68. Which of the following partially miscible liquid pairs has both lower and upper critical solution temperature?
  1.    Water and Phenol
  2.    Aniline and n-hexane
  3.    Glycerine and m-toluene
  4.    Water and diethyl aniline
 Discuss Question
Answer: Option C. -> Glycerine and m-toluene
Question 69. The aprotic solvent is
  1.    H2O
  2.    C6H6
  3.    HF
  4.    NH3
 Discuss Question
Answer: Option C. -> HF
Question 70. Which of the following has the highest lattice energy?
  1.    KF
  2.    CsF
  3.    NaF
  4.    RbF
 Discuss Question
Answer: Option C. -> NaF

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