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MCQs

Total Questions : 273 | Page 22 of 28 pages
Question 211. Calcium carbonate CaCO₃ is a
  1.    solid
  2.    liquid
  3.    gas
  4.    aqueous
 Discuss Question
Answer: Option A. -> solid
Answer: (a).solid
Question 212. Chemical formula of aluminum nitrate is
  1.    AlNi₃
  2.    Al₃Ni₂
  3.    Al(NO₂)₃
  4.    Al(NO₃)₃
 Discuss Question
Answer: Option D. -> Al(NO₃)₃
Answer: (d).Al(NO₃)₃
Question 213. Mass of an element in a compound can be calculated through
  1.    Ar of the atoms/Mr of the compound
  2.    Mr of the atoms/Ar of the compound
  3.    (Ar of the atoms/Mr of the compound) × mass of sample
  4.    (Mr of the compound/Ar of the atoms) × mass of sample
 Discuss Question
Answer: Option C. -> (Ar of the atoms/Mr of the compound) × mass of sample
Answer: (c).(Ar of the atoms/Mr of the compound) × mass of sample
Question 214. Variable valencies are used to indicate ions
  1.    greater than +1
  2.    greater than −1
  3.    with more than one valency
  4.    all of these
 Discuss Question
Answer: Option C. -> with more than one valency
Answer: (c).with more than one valency
Question 215. In CuO (Copper Oxide), valency of Copper is
  1.     +1
  2.     +2
  3.    −1
  4.    −2
 Discuss Question
Answer: Option C. -> −1
Answer: 2
Question 216. In order to get Sodium Sulfite (Na₂SO₃) as product, reactants shall be Sulfur Dioxide (SO₂) and
  1.    Na₂CO₃
  2.    NaOH
  3.    NaCl
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 217. Formula of Ammonium Sulfate ((NH₄)₂SO₄) is
  1.    NH₄(SO₄)₂
  2.    NH₄(HSO₄)₂
  3.    (NH₄)₂SO₄
  4.    (NH₃)2SO₃
 Discuss Question
Answer: Option C. -> (NH₄)₂SO₄
Answer: (c).(NH₄)₂SO₄
Question 218. Relative molecular mass of Na₂CO₃ is
  1.    98
  2.    128
  3.    286
  4.    198
 Discuss Question
Answer: Option C. -> 286
Answer: (c).286
Question 219. Formula Ca(OH)₂ is of
  1.    Calcium Hydrogen per oxide
  2.    calcium hydroxy acids
  3.    calcium hydro peroxide
  4.    calcium hydroxide
 Discuss Question
Answer: Option D. -> calcium hydroxide
Answer: (d).calcium hydroxide
Question 220. All are covalent compounds except
  1.    SO₃
  2.    SO₂
  3.    H₂SO₄
  4.    HCl
 Discuss Question
Answer: Option C. -> H₂SO₄
Answer: (c).H₂SO₄

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