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MCQs

Total Questions : 273 | Page 20 of 28 pages
Question 191. A salt(s) and H₂(g) is produced if reactants are
  1.    an acid and oxide
  2.    an acid and a metal
  3.    an acid and base
  4.    an acid and a sodium hydrogen carbonate
 Discuss Question
Answer: Option B. -> an acid and a metal
Answer: (b).an acid and a metal
Question 192. In Na₂CO₃.10H₂O, percentage of Carbon is
  1.    0.4201
  2.    0.0422
  3.    0.042
  4.    0.46
 Discuss Question
Answer: Option C. -> 0.042
Answer: (c).0.042
Question 193. Formula of Copper Hydroxide is
  1.    Cu(OH)₂
  2.    CuHOH
  3.    CuO₂
  4.    CuH₂O
 Discuss Question
Answer: Option A. -> Cu(OH)₂
Answer: (a).Cu(OH)₂
Question 194. Molar mass of Copper Oxide (Cu₂O) is
  1.    113.14g/mol
  2.    139.33g/mol
  3.    173.298g/mol
  4.    143.09g/mol
 Discuss Question
Answer: Option D. -> 143.09g/mol
Answer: (d).143.09g/mol
Question 195. Consider reactants: HNO₃ and BaSO₃
  1.    reaction takes place in aquatic state
  2.    the reaction results in Barium nitrate
  3.    reaction results in barium nitrite
  4.    the reaction may not occur at all
 Discuss Question
Answer: Option D. -> the reaction may not occur at all
Answer: (d).the reaction may not occur at all
Question 196. Copper can have a charge of
  1.    2 or 4
  2.    4 or 6
  3.    3 or 5
  4.    2 or 1
 Discuss Question
Answer: Option D. -> 2 or 1
Answer: (d).2 or 1
Question 197. In Na₂CO₃.10H₂O, after water, highest percentage composition is of
  1.    sodium
  2.    oxygen
  3.    carbon
  4.    hydrogen
 Discuss Question
Answer: Option B. -> oxygen
Answer: (b).oxygen
Question 198. Formula of Calcium Hydrogen Carbonate indicates
  1.    that the charge on Ca is +2
  2.    the charge on HCO₃ is −1
  3.    that for each molecule of calcium hydrogen carbonate, one ion of Ca and two ions of hydrogen carbona
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 199. Metal that burns even more brightly than Magnesium (Mg) is
  1.    zinc
  2.    mercury
  3.    zirconium
  4.    diamond
 Discuss Question
Answer: Option C. -> zirconium
Answer: (c).zirconium
Question 200. Valency of Ferrum can be
  1.    2 or 4
  2.    4 or 6
  3.    3 or 5
  4.    2 or 3
 Discuss Question
Answer: Option D. -> 2 or 3
Answer: (d).2 or 3

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