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MCQs

Total Questions : 273 | Page 28 of 28 pages
Question 271. Chemical formula of calcium nitrate is
  1.    CNOH
  2.    Ca(NO₃)₂
  3.    CaNO₃
  4.    CaNO₃
 Discuss Question
Answer: Option B. -> Ca(NO₃)₂
Answer: (b).Ca(NO₃)₂
Question 272. In Na₂CO₃, relative atomic mass of Oxygen is
  1.    12
  2.    24
  3.    36
  4.    48
 Discuss Question
Answer: Option D. -> 48
Answer: (d).48
Question 273. If atomic mass of copper is 63.546, mass percent of copper in Cu₂O will be
  1.    0.7898
  2.    0.8098
  3.    0.8882
  4.    0.8678
 Discuss Question
Answer: Option C. -> 0.8882
Answer: (c).0.8882

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