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MCQs

Total Questions : 168 | Page 11 of 17 pages
Question 101. Relative amounts of elements are discussed in
  1.    Testing
  2.    quantitative analysis
  3.    Qualitative analysis
  4.    Physical test
 Discuss Question
Answer: Option B. -> quantitative analysis
Answer: (b).quantitative analysis
Question 102. Solvent used for crystallization must be
  1.    expensive
  2.    inexpensie
  3.    moderate
  4.    low quality
 Discuss Question
Answer: Option B. -> inexpensie
Answer: (b).inexpensie
Question 103. An agent used for decoulourization is
  1.    sulphuric acid
  2.    animal charcoal
  3.    acetic acid
  4.    alcohol
 Discuss Question
Answer: Option B. -> animal charcoal
Answer: (b).animal charcoal
Question 104. Solvents used in crystallization should be
  1.    miscible
  2.    immiscible
  3.    polar
  4.    non polar
 Discuss Question
Answer: Option A. -> miscible
Answer: (a).miscible
Question 105. Another method used occasionally for drying crystals is
  1.    vacuum desiccator
  2.    hot plate
  3.    water bath
  4.    gas bath
 Discuss Question
Answer: Option A. -> vacuum desiccator
Answer: (a).vacuum desiccator
Question 106. After collection crystals are washed with solvent, which should be
  1.    hot
  2.    cold
  3.    dilute
  4.    polar
 Discuss Question
Answer: Option B. -> cold
Answer: (b).cold
Question 107. To filter HCL solution crucible is covered with
  1.    tissue
  2.    paper
  3.    asbestos
  4.    wax
 Discuss Question
Answer: Option C. -> asbestos
Answer: (c).asbestos
Question 108. In paper chromatography stationary phase is
  1.    water
  2.    solid or liquid
  3.    gas
  4.    solution
 Discuss Question
Answer: Option A. -> water
Answer: (a).water
Question 109. Inorganic impurities during solvent extraction remains in the
  1.    ether layer
  2.    aqueous layer
  3.    middle layer
  4.    at the bottom
 Discuss Question
Answer: Option B. -> aqueous layer
Answer: (b).aqueous layer
Question 110. Instrument used to heat inflammable liquids in crystallization is
  1.    flame
  2.    wire gauze
  3.    hot plate
  4.    water bath
 Discuss Question
Answer: Option D. -> water bath
Answer: (d).water bath

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