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MCQs

Total Questions : 273 | Page 5 of 28 pages
Question 41. While calculating empirical formula, simplest ratio is obtained by dividing
  1.    the smallest number
  2.    the largest number
  3.    the relative atomic mass
  4.    the relative mass of a covalent compound
 Discuss Question
Answer: Option A. -> the smallest number
Answer: (a).the smallest number
Question 42. Hydrogen Sulfate (H₂SO₄) has
  1.    positive charge
  2.    negative charge
  3.    double negative charge
  4.    double positive charge
 Discuss Question
Answer: Option B. -> negative charge
Answer: (b).negative charge
Question 43. To balance Al(OH)₃ + HNO₃ → Al(NO₃)₃ + H₂O, number of H₂O molecules produced will be
  1.    2
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option C. -> 6
Answer: (c).6
Question 44. One molecule each of Magnesium Chloride (MgCl₂), Water (H₂O) and Carbon dioxide (CO₂) results if reactants are
  1.    MgCO₃ and HCl
  2.    MgCO₃ and 2HCl
  3.    MgHCO₃ and HCl
  4.    MgHCO₃ and 2HCl
 Discuss Question
Answer: Option B. -> MgCO₃ and 2HCl
Answer: (b).MgCO₃ and 2HCl
Question 45. To balance Cu + H₂SO₄ → CuSO₄ + H₂O + SO₂; number of H₂SO₄ molecules will be
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 46. An ionic equation chemical reaction,
  1.    symbolically represents all ions in the solution
  2.    the states of reactants and products are mentioned as transcripts
  3.    aqueous elements are shown as the ions it produces in solution
  4.    all of these
 Discuss Question
Answer: Option C. -> aqueous elements are shown as the ions it produces in solution
Answer: (c).aqueous elements are shown as the ions it produces in solution
Question 47. Formula of Calcium Nitride (Ca₃N₂) is
  1.    Ca₃N₅
  2.    Ca₃NO₂
  3.    Ca₃N₂
  4.    Ca₂N₅
 Discuss Question
Answer: Option C. -> Ca₃N₂
Answer: (c).Ca₃N₂
Question 48. Consider chemical reaction ZnCO₃ + HNO₃ → Al(NO₃)₃ + H₂O, number of HNO₃ molecules required for a balanced equation will be
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 49. Natural gas consists of
  1.    methane
  2.    ethane
  3.    propane
  4.    butane
 Discuss Question
Answer: Option A. -> methane
Answer: (a).methane
Question 50. All of these radicals have a valency of -1, except
  1.    OH
  2.    SO₄
  3.    NO₃
  4.    HCO₃
 Discuss Question
Answer: Option B. -> SO₄
Answer: (b).SO₄

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