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MCQs

Total Questions : 168 | Page 13 of 17 pages
Question 121. Crystals are collected by Gooch crucible with help of
  1.    force
  2.    water bath
  3.    vacuum pump
  4.    centrifuge
 Discuss Question
Answer: Option C. -> vacuum pump
Answer: (c).vacuum pump
Question 122. Distribution coefficient is represented by
  1.    K
  2.    S
  3.    H
  4.    G
 Discuss Question
Answer: Option A. -> K
Answer: (a).K
Question 123. Chromatography with solid stationary phase is called
  1.    circle chromatography
  2.    Square chromatography
  3.    solid chromatography
  4.    adsorption chromatography
 Discuss Question
Answer: Option D. -> adsorption chromatography
Answer: (d).adsorption chromatography
Question 124. Crucible which is made up of porcelain is
  1.    Gooch crucible
  2.    sintered glass crucible
  3.    clay crucible
  4.    none of these
 Discuss Question
Answer: Option A. -> Gooch crucible
Answer: (a).Gooch crucible
Question 125. Solvent should dissolve large amount of solute at
  1.    cold temperature
  2.    room temperature
  3.    melting point
  4.    boiling point
 Discuss Question
Answer: Option D. -> boiling point
Answer: (d).boiling point
Question 126. In order to separate colors, dyes and amino acids, useful method will be
  1.    crystallization
  2.    centrifugation
  3.    filtration
  4.    chromatography
 Discuss Question
Answer: Option D. -> chromatography
Answer: (d).chromatography
Question 127. In Liebig condenser,
  1.    the coldest part of the condenser is at the top
  2.    the water enters in the jacket from the top
  3.    the coldest part of the condenser is at the bottom
  4.    the water enters in the jacket from the middle tubules
 Discuss Question
Answer: Option C. -> the coldest part of the condenser is at the bottom
Answer: (c).the coldest part of the condenser is at the bottom
Question 128. Impurities,
  1.    lower the boiling point
  2.    lower the freezing point
  3.    lower melting points
  4.    raise the melting point
 Discuss Question
Answer: Option C. -> lower melting points
Answer: (c).lower melting points
Question 129. A dissolved solid can be separated from solution through
  1.    simple filtration
  2.    sublimation
  3.    evaporation
  4.    decanting
 Discuss Question
Answer: Option C. -> evaporation
Answer: (c).evaporation
Question 130. Addition of salt in water will
  1.    lower the boiling point
  2.    lower the freezing point
  3.    raise the boiling point
  4.    raise the melting point
 Discuss Question
Answer: Option C. -> raise the boiling point
Answer: (c).raise the boiling point

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