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MCQs

Total Questions : 217 | Page 8 of 22 pages
Question 71. The oxidation number of Al in Al₂Cl₆ is
  1.    +1
  2.    +2
  3.    +3
  4.    +4
 Discuss Question
Answer: Option C. -> +3
Answer: (c).+3
Question 72. The oxidation number of Na in NaCl is
  1.    +1
  2.    +2
  3.    +3
  4.    +4
 Discuss Question
Answer: Option A. -> +1
Answer: (a).+1
Question 73. Without water, aluminum chloride exists as
  1.    Al₂Cl₃
  2.    AlCl₃
  3.    Al₂Cl₆
  4.    Al₂O₃
 Discuss Question
Answer: Option C. -> Al₂Cl₆
Answer: (c).Al₂Cl₆
Question 74. Ionic Chlorides of which of these do not react with water
  1.    NaCl
  2.    Al₂Cl₆
  3.    SiCl₄
  4.    PCl₅
 Discuss Question
Answer: Option A. -> NaCl
Answer: (a).NaCl
Question 75. Ionic Chlorides of which of these do not react with water
  1.    SiCl₄
  2.    MgCl₂
  3.    PCl₅
  4.    SCl₂
 Discuss Question
Answer: Option B. -> MgCl₂
Answer: (b).MgCl₂
Question 76. Metal chloride that is hydrolyzed is
  1.    Al₂Cl₆
  2.    SiCl₄
  3.    PCl₅
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 77. Which statement is correct about the physical properties of elements across the period?
  1.    they do not change
  2.    they change
  3.    melting temperature changes
  4.    boiling temperature changes
 Discuss Question
Answer: Option B. -> they change
Answer: (b).they change
Question 78. Consider the reaction: P₄O₁₀(s) + H₂O (l) → H₃PO₄ (aq). The moles of H₂O required to balance equation will be
  1.    2
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option C. -> 6
Answer: (c).6
Question 79. From the metals in a period, the neighboring members differ by
  1.    multiple neutrons
  2.    multiple protons
  3.    multiple electrons
  4.    none of above
 Discuss Question
Answer: Option A. -> multiple neutrons
Answer: (a).multiple neutrons
Question 80. The reaction NaCl(s) → Na⁺(aq) + Cl⁻(aq) shows that the
  1.    NaCl reacts with water
  2.    NaCl is hydrated
  3.    NaCl is insoluble in water
  4.    NaCl is hydrolyzed by water
 Discuss Question
Answer: Option B. -> NaCl is hydrated
Answer: (b).NaCl is hydrated

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