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MCQs

Total Questions : 217 | Page 9 of 22 pages
Question 81. Consider the reaction: Al₂O₃+H₂SO₄ → Al₂(SO₄)₃. The 2nd by-product in this reaction will be
  1.    HO₃⁺
  2.    OH⁻
  3.    H₂O(l)
  4.    H₂(g)
 Discuss Question
Answer: Option C. -> H₂O(l)
Answer: (c).H₂O(l)
Question 82. +7 is the oxidation number of
  1.    Mg
  2.    Al
  3.    Ar
  4.    Cl
 Discuss Question
Answer: Option D. -> Cl
Answer: (d).Cl
Question 83. Element that uses all outer shell electrons in bonding with oxygen is
  1.    Si only
  2.    Mg only
  3.    Al
  4.    Si and Mg
 Discuss Question
Answer: Option D. -> Si and Mg
Answer: (d).Si and Mg
Question 84. Consider the reaction: Al₂O₃+NaOH + H₂O (l) → NaAl(OH)₄ (aq). Moles of H₂O required to balance the equation are
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3
Question 85. Consider the reaction: Al₂O₃ + NaOH + H₂O(l) → NaAl(OH)₄(aq). Moles of NaAl(OH)₄(aq) produced with 1 mole of Al₂O₃ will be
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option A. -> 1
Answer: (a).1
Question 86. Metal chloride that is hydrated is
  1.    MgCl₂
  2.    Al₂Cl₃
  3.    PCl₅
  4.    SCl₂
 Discuss Question
Answer: Option A. -> MgCl₂
Answer: (a).MgCl₂
Question 87. The type of molecular structure of beginning Period 3 elements is
  1.    giant metallic structure
  2.    giant molecules
  3.    simple molecules
  4.    individual atoms
 Discuss Question
Answer: Option A. -> giant metallic structure
Answer: (a).giant metallic structure
Question 88. An Oxidation number can be
  1.    positive
  2.    negative
  3.    zero
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 89. Element that uses all outer shell electrons in bonding with oxygen (O₂) is
  1.    S only
  2.    Na only
  3.    N
  4.    S and Na
 Discuss Question
Answer: Option D. -> S and Na
Answer: (d).S and Na
Question 90. Consider the reaction: Al₂O₃+H₂SO₄ → Al₂(SO₄)₃ + H₂O. Moles of H₂SO₄ required to balance the equation are
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3

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