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MCQs

Total Questions : 168 | Page 15 of 17 pages
Question 141. In electronic industry, silicon is used in making
  1.    microwave oven bodies
  2.    television sets
  3.    microchips
  4.    motherboards
 Discuss Question
Answer: Option C. -> microchips
Answer: (c).microchips
Question 142. Fermented liquor can be purified and separated through
  1.    simple distillation
  2.    fractional distillation
  3.    sublimation
  4.    centrifugation
 Discuss Question
Answer: Option B. -> fractional distillation
Answer: (b).fractional distillation
Question 143. Fine insoluble solid particles can be removed through
  1.    crystallization
  2.    decanting
  3.    centrifuging
  4.    separating funnel
 Discuss Question
Answer: Option C. -> centrifuging
Answer: (c).centrifuging
Question 144. Crystals refers to
  1.    a solid that can be dissolved in liquids
  2.    a solid that re appears from other substances
  3.    a solid that reappears from the solution
  4.    can be obtained through sublimation
 Discuss Question
Answer: Option C. -> a solid that reappears from the solution
Answer: (c).a solid that reappears from the solution
Question 145. Distilled water
  1.    has some impurities left in it
  2.    is very pure water
  3.    is obtained through fractional distillation
  4.    is obtained through decanting
 Discuss Question
Answer: Option B. -> is very pure water
Answer: (b).is very pure water
Question 146. Electronic thermometers
  1.    are mercury in glass thermometer
  2.    alcohol in glass thermometer
  3.    are used to reduce the risk of mercury poisoning if broken
  4.    are greatly replaced by alcohol in glass thermometer
 Discuss Question
Answer: Option C. -> are used to reduce the risk of mercury poisoning if broken
Answer: (c).are used to reduce the risk of mercury poisoning if broken
Question 147. 100 cm3, 250 cm3 and 1 dm3 can be measured using
  1.    measuring cylinder
  2.    beaker
  3.    volumetric flask
  4.    burette
 Discuss Question
Answer: Option C. -> volumetric flask
Answer: (c).volumetric flask
Question 148. Unit for volumes does not include
  1.    ccm
  2.    cdm
  3.    liters
  4.    tones
 Discuss Question
Answer: Option D. -> tones
Answer: (d).tones
Question 149. Electron balances can measure accurately up to
  1.    0.01g
  2.    0.001 g
  3.    0.1g
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 150. Data loggers are
  1.    data punching devices
  2.    devices used to draw graph of temperature against time
  3.    are a form of stop watch
  4.    have replaced gas syringes
 Discuss Question
Answer: Option B. -> devices used to draw graph of temperature against time
Answer: (b).devices used to draw graph of temperature against time

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