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MCQs

Total Questions : 217 | Page 20 of 22 pages
Question 191. While Potassium Iodide (KI) is a powerful reducing agent,
  1.    the iodide ion is oxidized to iodine
  2.    the iodide ion is reduced to iodine
  3.    iodine is reduced to iodide ion
  4.    iodine is oxidized to iodide ion
 Discuss Question
Answer: Option A. -> the iodide ion is oxidized to iodine
Answer: (a).the iodide ion is oxidized to iodine
Question 192. In Copper Oxide (CuO) and Carbon Monoxide (CO) reaction
  1.    CO is being oxidized
  2.    CuO is being oxidized
  3.    CO is being reduced
  4.    CuO is being reduced
 Discuss Question
Answer: Option A. -> CO is being oxidized
Answer: (a).CO is being oxidized
Question 193. While Iodide ion (I-) oxidizes to Iodine (I2), a change in color from colorless to
  1.    brown occurs
  2.    pink occurs
  3.    blue occurs
  4.    violet occurs
 Discuss Question
Answer: Option A. -> brown occurs
Answer: (a).brown occurs
Question 194. Oxidation is also referred to as
  1.    combustion
  2.    respiration
  3.    transpiration
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 195. Upon adding sugar in hot drink, slow dissolution is of
  1.    sugar cubes dissolve slowly
  2.    granulated sugar cubes dissolve slowly
  3.    brown sugar doesn?t dissolve easily
  4.    all of the above
 Discuss Question
Answer: Option A. -> sugar cubes dissolve slowly
Answer: (a).sugar cubes dissolve slowly
Question 196. Oxidation always takes place at the electrode
  1.    At cathode
  2.    At anode
  3.    At both electrodes
  4.    In the salt bridge
 Discuss Question
Answer: Option B. -> At anode
Answer: (b).At anode
Question 197. 5g of glucose is dissolved in 100 cm³ of solution. The percentage of solution is
  1.    5% w/w
  2.    5% w/v
  3.    5% v/w
  4.    5% v/v
 Discuss Question
Answer: Option B. -> 5% w/v
Answer: (b).5% w/v
Question 198. An agent after oxidizing the other substance gets itself reduced is called
  1.    oxidizing agent
  2.    Reducing agent
  3.    Dehydrating agent
  4.    None of above
 Discuss Question
Answer: Option A. -> oxidizing agent
Answer: (a).oxidizing agent
Question 199. The increase in oxidation number is called
  1.    Oxidation
  2.    Reduction
  3.    Halogenation
  4.    Hydration
 Discuss Question
Answer: Option A. -> Oxidation
Answer: (a).Oxidation
Question 200. The amount of solute and solvent can be expressed in percentage composition in different ways
  1.    Two
  2.    Three
  3.    Four
  4.    Five
 Discuss Question
Answer: Option C. -> Four
Answer: (c).Four

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