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MCQs

Total Questions : 228 | Page 3 of 23 pages
Question 21. Water of crystallization is found in
  1.    Potassium chloride KCl
  2.    Zinc Sulphate ZnSO₄
  3.    Copper Sulphate CuSO₄
  4.    Sodium Chloride NaCl
 Discuss Question
Answer: Option C. -> Copper Sulphate CuSO₄
Answer: (c).Copper Sulphate CuSO₄
Question 22. Consider equation: Cu+2(aq) + 2OH-(aq) → Cu(OH)₂(s). precipitate of Copper Hydroxide (Cu(OH)₂) will be of
  1.    green color
  2.    blue color
  3.    brown color
  4.    white color
 Discuss Question
Answer: Option B. -> blue color
Answer: (b).blue color
Question 23. Consider reaction: CuO + H₂SO₄ → CuSO₄ + H₂O. salt is obtained through the
  1.    crystallization
  2.    fractional distillation
  3.    vacuum distillation
  4.    centrifugation
 Discuss Question
Answer: Option D. -> centrifugation
Answer: (d).centrifugation
Question 24. Acid salts do not include
  1.    sodium hydrogen sulphate
  2.    calcium hydrogen carbonate
  3.    sodium phosphate
  4.    disodium hydrogen phosphate
 Discuss Question
Answer: Option C. -> sodium phosphate
Answer: (c).sodium phosphate
Question 25. Soluble salt is
  1.    silver chloride AgCl
  2.    Lead Chloride PbCl₂
  3.    Sodium chloride NaCl
  4.    mercury chloride HgCl₂
 Discuss Question
Answer: Option C. -> Sodium chloride NaCl
Answer: (c).Sodium chloride NaCl
Question 26. Repeated extraction using small portion of solvent are more
  1.    Accurate
  2.    Efficient
  3.    Slow
  4.    Rapid
 Discuss Question
Answer: Option B. -> Efficient
Answer: (b).Efficient
Question 27. Basic principle of crystallization is that solute should be soluble in suitable solvent at
  1.    High Temperature
  2.    Freezing temperature
  3.    Low temperature
  4.    Room temperature
 Discuss Question
Answer: Option A. -> High Temperature
Answer: (a).High Temperature
Question 28. There are main types of chromatography
  1.    Three
  2.    Four
  3.    Five
  4.    Six
 Discuss Question
Answer: Option B. -> Four
Answer: (b).Four
Question 29. In solvent extraction, free iodine molecules are present in
  1.    Aqueous phase
  2.    Organic phase
  3.    Mobile phase
  4.    Stationary phase
 Discuss Question
Answer: Option B. -> Organic phase
Answer: (b).Organic phase
Question 30. Slow cooling always yields crystals
  1.    Smaller
  2.    Bigger
  3.    No Crystals
  4.    Minimum
 Discuss Question
Answer: Option B. -> Bigger
Answer: (b).Bigger

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