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MCQs

Total Questions : 350 | Page 10 of 35 pages
Question 91. The energy of activation of forwarding reaction is less than that of backward reaction in
  1.    Endothermic reactions
  2.    Exothermic reactions
  3.    Isothermal reactions
  4.    All reactions
 Discuss Question
Answer: Option B. -> Exothermic reactions
Answer: (b).Exothermic reactions
Question 92. By increasing temperature, the rate of chemical reaction increases. It is due to
  1.    Greater number of molecules
  2.    Greater number of collisions
  3.    Greater velocity of molecules
  4.    Lesser number of molecules
 Discuss Question
Answer: Option A. -> Greater number of molecules
Answer: (a).Greater number of molecules
Question 93. The precipitation occurs if the ionic concentration is
  1.    Equal to Ksp
  2.    Less that Ksp
  3.    More than Ksp
  4.    None of above
 Discuss Question
Answer: Option C. -> More than Ksp
Answer: (c).More than Ksp
Question 94. Minimum amount of energy required to activate atoms, ions and molecules to undergo chemical reaction is called
  1.    Kinetic energy
  2.    Potential energy
  3.    Activation energy
  4.    Rotational energy
 Discuss Question
Answer: Option C. -> Activation energy
Answer: (c).Activation energy
Question 95. Ionic product of water is denoted as
  1.    Kc
  2.    Ka
  3.    Kb
  4.    Kw
 Discuss Question
Answer: Option D. -> Kw
Answer: (d).Kw
Question 96. Oxidation number of "S" in H₂SO₄ is
  1.    6
  2.    -6
  3.    4
  4.    -4
 Discuss Question
Answer: Option A. -> 6
Answer: (a).6
Question 97. Molarity of concentrated nitric acid is
  1.    12 M
  2.    14 M
  3.    18 M
  4.    36 M
 Discuss Question
Answer: Option B. -> 14 M
Answer: (b).14 M
Question 98. A solution containing 3.16 g of KMnO₄/dm³ of its solution is
  1.    0.02M
  2.    0.1M
  3.    0.05M
  4.    0.01M
 Discuss Question
Answer: Option A. -> 0.02M
Answer: (a).0.02M
Question 99. Molecular weight of acetic acid is
  1.    63
  2.    60
  3.    90
  4.    40
 Discuss Question
Answer: Option B. -> 60
Answer: (b).60
Question 100. Weight of KMnO₄ required to prepare 0.1 M KMnO₄ one dm³ solution is
  1.    15.8 g
  2.    158 g
  3.    1.58 g
  4.    3.16 g
 Discuss Question
Answer: Option A. -> 15.8 g
Answer: (a).15.8 g

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