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MCQs

Total Questions : 168 | Page 12 of 17 pages
Question 111. Type of crucibles used for filtration is usually
  1.    two
  2.    seven
  3.    six
  4.    five
 Discuss Question
Answer: Option B. -> seven
Answer: (b).seven
Question 112. Crude oil can be fractionally distilled to produce
  1.    diesel
  2.    petrol
  3.    paraffin
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 113. Mixtures have
  1.    a range of boiling points
  2.    a range of melting points
  3.    a lack of exact concentrations
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 114. Vacuum distillation is used
  1.    under high pressures
  2.    under low pressures
  3.    on gentle heating
  4.    upon quick heating
 Discuss Question
Answer: Option B. -> under low pressures
Answer: (b).under low pressures
Question 115. Alternative techniques to crystallization involve
  1.    decanting
  2.    centrifuging
  3.    filtration
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 116. Filtrate refers to the
  1.    insoluble solid in the filtration
  2.    solution which dissolves
  3.    crystals
  4.    solution that passes through the filtrate funnel
 Discuss Question
Answer: Option D. -> solution that passes through the filtrate funnel
Answer: (d).solution that passes through the filtrate funnel
Question 117. Pure substances
  1.    have fixed and exact boiling point
  2.    have fixed and exact melting points
  3.    form only one post on chromatogram
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 118. Oil and water is an example of
  1.    miscible
  2.    impure substances may also form the crystals
  3.    filtrate
  4.    suspension
 Discuss Question
Answer: Option B. -> impure substances may also form the crystals
Answer: (b).impure substances may also form the crystals
Question 119. Dissolving, filtering and evaporating are methods of
  1.    ice melting
  2.    purification
  3.    diffusion
  4.    change of state
 Discuss Question
Answer: Option B. -> purification
Answer: (b).purification
Question 120. Crystallization of microchips does not involve
  1.    a solute
  2.    a crystal
  3.    a solvent
  4.    a soluble
 Discuss Question
Answer: Option C. -> a solvent
Answer: (c).a solvent

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