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MCQs

Total Questions : 273 | Page 6 of 28 pages
Question 51. Formula Al(NO₃)₃ indicates that
  1.    three molecules of aluminum are combined with three molecules of Nitrogen oxide
  2.    three molecules of aluminum are combined with three molecules of Nitrate ion
  3.    one molecules of aluminum is combined with three molecules of Nitrate ion
  4.    one molecules of aluminum is combined with one molecules of Nitrate ion
 Discuss Question
Answer: Option C. -> one molecules of aluminum is combined with three molecules of Nitrate ion
Answer: (c).one molecules of aluminum is combined with three molecules of Nitrate ion
Question 52. In acid and base reaction, product includes
  1.    a salt(s)
  2.    water
  3.    acids
  4.    both a and b
 Discuss Question
Answer: Option C. -> acids
Answer: (c).acids
Question 53. In Na₂CO₃.10H₂O, relative formula mass is
  1.    158
  2.    186
  3.    286
  4.    288
 Discuss Question
Answer: Option C. -> 286
Answer: (c).286
Question 54. Valency of Plumbum can be
  1.    2 or 4
  2.    4 or 6
  3.    3 or 5
  4.    2 or 3
 Discuss Question
Answer: Option A. -> 2 or 4
Answer: (a).2 or 4
Question 55. Valency of magnesium is
  1.     +1
  2.     +2
  3.    -1
  4.    -2
 Discuss Question
Answer: Option B. -> +2
Answer: (b). +2
Question 56. Combining Copper(II) (Cu+2) with Oxygen (O₂) results in
  1.    CuO
  2.    Cu₂O
  3.    CuO₂
  4.    Cu(OH)₂
 Discuss Question
Answer: Option A. -> CuO
Answer: (a).CuO
Question 57. Molar mass of (NH₄)₂SO₄ is
  1.    113.19g/mol
  2.    124.21g/mol
  3.    141.39g/mol
  4.    132.139 g/mol
 Discuss Question
Answer: Option D. -> 132.139 g/mol
Answer: (d).132.139 g/mol
Question 58. When Carbon ions (C±4) react with Carbon Dioxide gas (CO₂), product will be
  1.    methane
  2.    ethane
  3.    propane
  4.    carbon monoxide
 Discuss Question
Answer: Option D. -> carbon monoxide
Answer: (d).carbon monoxide
Question 59. Chemical formula of rouge pigment is
  1.    Fe₂O₃
  2.    Fe₃O₄
  3.    FeSO₄
  4.    FeNO₃
 Discuss Question
Answer: Option A. -> Fe₂O₃
Answer: (a).Fe₂O₃
Question 60. In order to form Copper(II) Hydroxide, number of Hydroxyl ions to gain stability with one Copper ion will be
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2

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