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MCQs

Total Questions : 1678 | Page 7 of 168 pages
Question 61. Number of moles of substance can be determined by
  1.    mass of substance/molar mass
  2.    mass of substance/molecular mass
  3.    atomic weight of substance/Avogadro constant
  4.    volume of substance
 Discuss Question
Answer: Option A. -> mass of substance/molar mass
Answer: (a).mass of substance/molar mass
Question 62. Avogadro's constant is the number which was first calculated by
  1.    Joseph Loschmidt
  2.    Amedeo Avogadro
  3.    Galileo
  4.    Charles
 Discuss Question
Answer: Option A. -> Joseph Loschmidt
Answer: (a).Joseph Loschmidt
Question 63. Avogadro's constant is the number
  1.    6.02 x 10²³
  2.    6.03 x 10³²
  3.    1.2 x 10⁶
  4.    1.23 x 10⁶²
 Discuss Question
Answer: Option A. -> 6.02 x 10²³
Answer: (a).6.02 x 10²³
Question 64. Gmol⁻¹ is the standard unit for
  1.    molecular mass
  2.    molar mass
  3.    Avogadro constant
  4.    atomic mass
 Discuss Question
Answer: Option B. -> molar mass
Answer: (b).molar mass
Question 65. The symbol used to denote Avogadro's constant is
  1.    A
  2.    L
  3.    V
  4.    G
 Discuss Question
Answer: Option B. -> L
Answer: (b).L
Question 66. The number of atoms of each element in a particular compound is represented through
  1.    molecular mass
  2.    ionic mass
  3.    nucleon number
  4.    formula
 Discuss Question
Answer: Option D. -> formula
Answer: (d).formula
Question 67. Nitration of a benzene molecule shows the reaction of
  1.    electrophilic substitution
  2.    addition reaction
  3.    nucleophilic substitution
  4.    none of above
 Discuss Question
Answer: Option A. -> electrophilic substitution
Answer: (a).electrophilic substitution
Question 68. Halogenoarenes are banned due to its
  1.    degradation
  2.    unreactiveness
  3.    non-toxicity
  4.    none of above
 Discuss Question
Answer: Option A. -> degradation
Answer: (a).degradation
Question 69. 1 mole of a sodium chloride (NaCl) has number of sodium ions (Na⁺) equal to
  1.    6.02 x 10²³
  2.    5.02 x 10²³
  3.    4.02 x 10²³
  4.    3.02 x 10²³
 Discuss Question
Answer: Option A. -> 6.02 x 10²³
Answer: (a).6.02 x 10²³
Question 70. Benzene reacts with bromine in the presence of an anhydrous iron bromide(III) catalyst to give
  1.    electrophilic substitution
  2.    addition reaction
  3.    nucleophilic substitution
  4.    none of above
 Discuss Question
Answer: Option A. -> electrophilic substitution
Answer: (a).electrophilic substitution

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