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MCQs

Total Questions : 228 | Page 4 of 23 pages
Question 31. This technique is used for detecting pesticide or insecticide residues in food
  1.    Liquid chromatography
  2.    Gas chromatography
  3.    Thin-layer chromatography
  4.    Paper chromatography
 Discuss Question
Answer: Option C. -> Thin-layer chromatography
Answer: (c).Thin-layer chromatography
Question 32. Liquid stationary phase in chromatography is classified as
  1.    Adsorption chromatography
  2.    Partition chromatography
  3.    Adsorption chromatography
  4.    Gas chromatography
 Discuss Question
Answer: Option B. -> Partition chromatography
Answer: (b).Partition chromatography
Question 33. After filtration, the liquid obtained on the filter paper is termed as
  1.    Extract
  2.    Residue
  3.    Filtrate
  4.    Sample
 Discuss Question
Answer: Option C. -> Filtrate
Answer: (c).Filtrate
Question 34. In crystallization, there are as many as steps used for purification of crude products
  1.    Five
  2.    Six
  3.    Seven
  4.    Eight
 Discuss Question
Answer: Option C. -> Seven
Answer: (c).Seven
Question 35. The process in which solute is distributed between two phases is called
  1.    Solvation
  2.    Evaporation
  3.    Chromatography
  4.    Filtration
 Discuss Question
Answer: Option C. -> Chromatography
Answer: (c).Chromatography
Question 36. The reagents used as drying agent in desiccators is
  1.    Silica gel
  2.    CaCl₂
  3.    P₂O₅
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Answer: (d).All of above
Question 37. A safe and reliable method of drying crystals is through
  1.    Animal charcoal
  2.    Vaccum desiccator
  3.    Silica gel
  4.    CaCl₂
 Discuss Question
Answer: Option B. -> Vaccum desiccator
Answer: (b).Vaccum desiccator
Question 38. Paper chromatography is used to separate
  1.    Amino acids and anions
  2.    RNA
  3.    Fingerprinting
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Answer: (d).All of above
Question 39. The process is used to separate insoluble particles from liquids
  1.    Crystallization
  2.    Filtration
  3.    Sublimation
  4.    Chromatography
 Discuss Question
Answer: Option B. -> Filtration
Answer: (b).Filtration
Question 40. The compounds that are purified by the process of sublimation includes
  1.    Iodine
  2.    Naphthalene
  3.    Benzoic acid
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Answer: (d).All of above

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