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MCQs

Total Questions : 204 | Page 19 of 21 pages
Question 181. The quantity of electricity is expressed in a unit called
  1.    Faraday
  2.    mol
  3.    gram
  4.    watts
 Discuss Question
Answer: Option A. -> Faraday
Answer: (a).Faraday
Question 182. 1 mole of Cl₂ requires electricity of
  1.    2 faraday
  2.    1 faraday
  3.    4 faraday
  4.    3 faraday
 Discuss Question
Answer: Option A. -> 2 faraday
Answer: (a).2 faraday
Question 183. In the graph of heating curve, increase in kinetic energy increases temperature and is called
  1.    Straight line
  2.    Slanted area
  3.    Flat area
  4.    None of above
 Discuss Question
Answer: Option B. -> Slanted area
Answer: (b).Slanted area
Question 184. Number of faradays required to discharge 1 mole of an ion is equal to charge on that ion is
  1.    Faraday's first law
  2.    Faraday's second law
  3.    Lenz's first law
  4.    Lenz's second law
 Discuss Question
Answer: Option B. -> Faraday's second law
Answer: (b).Faraday's second law
Question 185. Cations are
  1.    positively charged ions
  2.    negatively charged ions
  3.    travel towards anode during electrolysis
  4.    travel towards anode during polarization
 Discuss Question
Answer: Option A. -> positively charged ions
Answer: (a).positively charged ions
Question 186. Conventionally, negative terminals is shown as
  1.    a long thin line
  2.    a short fat line
  3.    a long wavy line
  4.    a short wavy line
 Discuss Question
Answer: Option B. -> a short fat line
Answer: (b).a short fat line
Question 187. Polarization occurs due to
  1.    rapid dissolving of magnesium in dilute acid
  2.    slow dissolving of magnesium in conc. Acid
  3.    copper electrode gets covered with bubbles of hydrogen gas
  4.    copper electrode gets covered with bubbles of ammonia gas
 Discuss Question
Answer: Option C. -> copper electrode gets covered with bubbles of hydrogen gas
Answer: (c).copper electrode gets covered with bubbles of hydrogen gas
Question 188. Duration of bright-bulb is shorter in a magnesium-copper battery because
  1.    the difference of copper ad magnesium in reactivity series is lesser
  2.    the polarization occurs too quickly
  3.    magnesium is highly reactive and dissolves very rapidly in acid
  4.    all of these
 Discuss Question
Answer: Option C. -> magnesium is highly reactive and dissolves very rapidly in acid
Answer: (c).magnesium is highly reactive and dissolves very rapidly in acid
Question 189. Examples of non-conductors include
  1.    sulphur
  2.    phosphorus
  3.    wood
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 190. The compound with the highest heat of vaporization is
  1.    Ethyl alcohol
  2.    Methyl alcohol
  3.    Water
  4.    Ammonia
 Discuss Question
Answer: Option C. -> Water
Answer: (c).Water

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