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MCQs

Total Questions : 273 | Page 23 of 28 pages
Question 221. In Na₂CO₃.10H₂O, highest percentage composition is of
  1.    sodium
  2.    oxygen
  3.    water
  4.    carbon
 Discuss Question
Answer: Option C. -> water
Answer: (c).water
Question 222. In H₂SO₄, chemical composition of oxygen is
  1.    0.1111
  2.    0.5032
  3.    0.6531
  4.    0.3265
 Discuss Question
Answer: Option C. -> 0.6531
Answer: (c).0.6531
Question 223. Chemical composition of a compound
  1.    is fixed
  2.    can be obtained through relative molecular mass
  3.    is variable
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 224. MgCO₃ + HCl reacts to form carbonic acid, which decomposes into
  1.    water
  2.    CO₂
  3.    gases
  4.    both a and b
 Discuss Question
Answer: Option C. -> gases
Answer: (c).gases
Question 225. In Copper Oxide (Cu₂O), charge on Copper (Cu) is
  1.     +1
  2.     +2
  3.    −1
  4.    −2
 Discuss Question
Answer: Option A. -> +1
Answer: (a). +1
Question 226. Chemical formula of Ammonium Sulfate is
  1.    NH₃SO₄
  2.    NH₄(HSO₄)₂
  3.    (NH₄)₂SO₄
  4.    (NH₂)₄SO₄
 Discuss Question
Answer: Option C. -> (NH₄)₂SO₄
Answer: (c).(NH₄)₂SO₄
Question 227. In Na₂CO₃, relative atomic mass of sodium is
  1.    23
  2.    46
  3.    48
  4.    58
 Discuss Question
Answer: Option B. -> 46
Answer: (b).46
Question 228. Relative molecular mass of Sulfuric Acid (H₂SO₄) is
  1.    98
  2.    58
  3.    108
  4.    120
 Discuss Question
Answer: Option A. -> 98
Answer: (a).98
Question 229. Stannum is Latin name of
  1.    Tin
  2.    Sulphur
  3.    Sodium
  4.    Nickel
 Discuss Question
Answer: Option A. -> Tin
Answer: (a).Tin
Question 230. The number of positive ions balances the number of negative charges so as to neutralize the compound and give the charge
  1.    one
  2.    unit
  3.    zero
  4.    negative
 Discuss Question
Answer: Option C. -> zero
Answer: (c).zero

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