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Total Questions : 270 | Page 22 of 27 pages
Question 211. Rate of evaporation is______
  1.    directly proportional to temperature of liquid
  2.    inversely proportional to temperature of liquid
  3.    independent of temperature of liquid
  4.    directly proportional to humidity of surrounding air
 Discuss Question
Answer: Option A. -> directly proportional to temperature of liquid
Answer: (a).directly proportional to temperature of liquid
Question 212. Statement related to the process of evaporation that is incorrect is?
  1.    Evaporation occurs at any temperature
  2.    Evaporation takes place within liquid
  3.    Temperature may change during evaporation
  4.    No bubbles are formed in liquid during evaporation
 Discuss Question
Answer: Option B. -> Evaporation takes place within liquid
Answer: (b).Evaporation takes place within liquid
Question 213. Rate of evaporation increases as?
  1.    exposed surface area of liquid increases
  2.    exposed surface area of liquid decreases
  3.    movement of air above surface of liquid decreases
  4.    atmospheric pressure increases
 Discuss Question
Answer: Option B. -> exposed surface area of liquid decreases
Answer: (b).exposed surface area of liquid decreases
Question 214. Which of the following factors do not affect the rate of evaporation?
  1.    Temperature of liquid
  2.    Humidity of surrounding air
  3.    Depth of liquid
  4.    Surface of liquid
 Discuss Question
Answer: Option C. -> Depth of liquid
Answer: (c).Depth of liquid
Question 215. Rate of evaporation decreases as?
  1.    temperature increases
  2.    humidity of surrounding air increases
  3.    movement of air above surface of liquid increases
  4.    atmospheric pressure decreases
 Discuss Question
Answer: Option B. -> humidity of surrounding air increases
Answer: (b).humidity of surrounding air increases
Question 216. Evaporation occurs only _____
  1.    after boiling
  2.    after extreme cooling
  3.    at surface of a liquid
  4.    if boiling occurs at atmospheric pressure
 Discuss Question
Answer: Option C. -> at surface of a liquid
Answer: (c).at surface of a liquid
Question 217. Crystallization, evaporation and distillation are a means of?
  1.    separating soluble substances in solution
  2.    separating insoluble substances in solutions
  3.    separating filtrate from solution
  4.    concentration
 Discuss Question
Answer: Option A. -> separating soluble substances in solution
Answer: (a).separating soluble substances in solution
Question 218. Compounds evaporating easily and giving off a smell are?
  1.    ionic compounds
  2.    covalent bonds
  3.    metallic bonds
  4.    dative bonds
 Discuss Question
Answer: Option B. -> covalent bonds
Answer: (b).covalent bonds
Question 219. When heating begins in miscible solutions, vapors formed will be?
  1.    of liquid lower in boiling point
  2.    of liquid higher in boiling point
  3.    vapors will be of both liquids with a higher concentration of liquid having low boiling point
  4.    collected in a gas syringe
 Discuss Question
Answer: Option C. -> vapors will be of both liquids with a higher concentration of liquid having low boiling point
Answer: (c).vapors will be of both liquids with a higher concentration of liquid having low boiling point
Question 220. Evaporation of solution of CuSO₄ helps in?
  1.    making it concentrated
  2.    crystallization of CuSO₄
  3.    evaporation of salt CuSO₄
  4.    concentration and crystallization
 Discuss Question
Answer: Option D. -> concentration and crystallization
Answer: (d).concentration and crystallization

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