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MCQs

Total Questions : 273 | Page 10 of 28 pages
Question 91. The molecular formula of different compounds shows actual numbers of
  1.    atoms
  2.    molecules
  3.    moles
  4.    ions
 Discuss Question
Answer: Option A. -> atoms
Answer: (a).atoms
Question 92. The percentage by mass of any element is calculated with the help of
  1.    formula of compound only
  2.    relative atomic masses only
  3.    nucleon number
  4.    formula of compound and relative atomic masses
 Discuss Question
Answer: Option D. -> formula of compound and relative atomic masses
Answer: (d).formula of compound and relative atomic masses
Question 93. The mass of each element in a compound helps in determining
  1.    empirical formula
  2.    molecular formula
  3.    structural formula
  4.    model
 Discuss Question
Answer: Option A. -> empirical formula
Answer: (a).empirical formula
Question 94. The formula of an ionic compound by rule is always its
  1.    molecular formula
  2.    empirical formula
  3.    structural formula
  4.    model
 Discuss Question
Answer: Option B. -> empirical formula
Answer: (b).empirical formula
Question 95. Two Greek words 'element' and 'measure' constitutes the word
  1.    spectrometry
  2.    stoichiometry
  3.    elemetry
  4.    geometry
 Discuss Question
Answer: Option B. -> stoichiometry
Answer: (b).stoichiometry
Question 96. The change in enthalpy is determined by using
  1.    Calorimeter
  2.    voltmeter
  3.    ammeter
  4.    Galvanometer
 Discuss Question
Answer: Option A. -> Calorimeter
Answer: (a).Calorimeter
Question 97. In homogeneous catalysis, the reactants and catalyst are in
  1.    Same phase
  2.    Different phase
  3.    Mixed phase
  4.    None of above
 Discuss Question
Answer: Option A. -> Same phase
Answer: (a).Same phase
Question 98. The product of internal energy and pressure-volume work is called
  1.    Entropy
  2.    Enthalpy
  3.    Kinetic energy
  4.    Potential energy
 Discuss Question
Answer: Option B. -> Enthalpy
Answer: (b).Enthalpy
Question 99. A substance that promotes the activity of a catalyst is called
  1.    Poison
  2.    Activator
  3.    Inhibitor
  4.    Auto catalyst
 Discuss Question
Answer: Option B. -> Activator
Answer: (b).Activator
Question 100. These are complex protein molecules that catalyse organic reactions in living cells
  1.    Enzymes
  2.    Vitamins
  3.    Carbohydrates
  4.    Lipids
 Discuss Question
Answer: Option A. -> Enzymes
Answer: (a).Enzymes

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