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MCQs

Total Questions : 217 | Page 18 of 22 pages
Question 171. The maximum oxidation number increases
  1.    across the group
  2.    down the column
  3.    across the period
  4.    down the group
 Discuss Question
Answer: Option C. -> across the period
Answer: (c).across the period
Question 172. In Phosphoric acid H₃PO₄, the oxidation state of Phosphorus is
  1.    +1
  2.    +3
  3.    +5
  4.    +7
 Discuss Question
Answer: Option C. -> +5
Answer: (c).+5
Question 173. The pH of the H₂SO₃(aq) is
  1.    1
  2.    3
  3.    5
  4.    6
 Discuss Question
Answer: Option A. -> 1
Answer: (a).1
Question 174. With purely ionic bonding, the oxides of metal sodium and magnesium produce with water the
  1.    alkali solutions
  2.    acidic solutions
  3.    basic solutions
  4.    noble gases
 Discuss Question
Answer: Option A. -> alkali solutions
Answer: (a).alkali solutions
Question 175. Aluminum oxide acts as a base when it reacts with
  1.    water
  2.    alkali
  3.    acid
  4.    base
 Discuss Question
Answer: Option C. -> acid
Answer: (c).acid
Question 176. Aluminum oxide never react or dissolve in
  1.    water
  2.    alkali
  3.    acid
  4.    base
 Discuss Question
Answer: Option A. -> water
Answer: (a).water
Question 177. Consider the equation: Mg(OH)₂(s) + HCl → MgCl₂. The other by product is
  1.    HO₃⁺
  2.    OH⁻
  3.    H₂O (l)
  4.    H₂(g)
 Discuss Question
Answer: Option C. -> H₂O (l)
Answer: (c).H₂O (l)
Question 178. Upon reaction with NaOH, Silicon dioxide (SiO₂) acts as
  1.    an acid
  2.    as an alkali
  3.    a solution
  4.    a gas
 Discuss Question
Answer: Option A. -> an acid
Answer: (a).an acid
Question 179. Sulfur dioxide (SO₂) and sulfur trioxide (SO₃) react and dissolve in water yielding
  1.    basic solutions
  2.    acidic solutions
  3.    alkalis
  4.    halogens
 Discuss Question
Answer: Option B. -> acidic solutions
Answer: (b).acidic solutions
Question 180. An acidic oxide (non-metal oxide) does not react with
  1.    acids
  2.    bases
  3.    salt solution
  4.    water
 Discuss Question
Answer: Option A. -> acids
Answer: (a).acids

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