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MCQs

Total Questions : 217 | Page 6 of 22 pages
Question 51. Oxidation involves
  1.    gain in oxygen
  2.    loss of oxygen
  3.    gain in hydrogen
  4.    gain in electrons
 Discuss Question
Answer: Option A. -> gain in oxygen
Answer: (a).gain in oxygen
Question 52. Non-metals are good at
  1.    accepting electrons
  2.    sharing electrons
  3.    donating electrons
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 53. In a Redox reaction,
  1.    oxidation occurs
  2.    reduction occurs
  3.    neutralization occurs
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 54. In plentiful supply of oxygen or air, burning of carbon gives off
  1.    carbon monoxide
  2.    carbon dioxide
  3.    H₃O
  4.    H₂CO₃
 Discuss Question
Answer: Option B. -> carbon dioxide
Answer: (b).carbon dioxide
Question 55. While passing hydrogen over heated CuO(s), black color is oxidized to
  1.    golden color
  2.    pink color
  3.    blue color
  4.    colorless
 Discuss Question
Answer: Option B. -> pink color
Answer: (b).pink color
Question 56. In Copper(II) Oxide (CuO) and Carbon Monoxide (CO) reaction,
  1.    CuO is being oxidized
  2.    CuO is being reduced
  3.    CO is being reduced
  4.    CO is being oxidized
 Discuss Question
Answer: Option B. -> CuO is being reduced
Answer: (b).CuO is being reduced
Question 57. In S₂Cl₂, the oxidation number is
  1.    +1
  2.    +2
  3.    +3
  4.    +4
 Discuss Question
Answer: Option A. -> +1
Answer: (a).+1
Question 58. The oxidation number of Si in SiCl₄ is
  1.    +2
  2.    +3
  3.    +4
  4.    +5
 Discuss Question
Answer: Option C. -> +4
Answer: (c).+4
Question 59. On hydration, [Al(H₂O)₆]³⁺ (aq) produces
  1.    H⁺ and [Al(H₂O)₅]²⁺(aq)
  2.    H₂(g) and [Al(H₂O)₄]²⁺(aq)
  3.    H₂(g) and [Al(H₂O)₃]+(aq)
  4.    none of above
 Discuss Question
Answer: Option A. -> H⁺ and [Al(H₂O)₅]²⁺(aq)
Answer: (a).H⁺ and [Al(H₂O)₅]²⁺(aq)
Question 60. The solution is turned acidic upon hydration of AlCl₃, because
  1.    Al⁺³ ions are formed
  2.    Cl⁻ are formed
  3.    H⁺ ions are formed
  4.    none of above
 Discuss Question
Answer: Option C. -> H⁺ ions are formed
Answer: (c).H⁺ ions are formed

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