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MCQs

Total Questions : 204 | Page 13 of 21 pages
Question 121. Salts of gold, silver, and platinum are found in droplets falling from
  1.    anode
  2.    cathode
  3.    inert electrode
  4.    bi-charged electrode
 Discuss Question
Answer: Option A. -> anode
Answer: (a).anode
Question 122. The concentrated aqueous solution of sodium chloride is called
  1.    brine
  2.    milk of magnesia
  3.    sludge
  4.    bauxite
 Discuss Question
Answer: Option A. -> brine
Answer: (a).brine
Question 123. Brine is gained from dissolving rock salt in
  1.    acid
  2.    base
  3.    alcohol
  4.    water
 Discuss Question
Answer: Option D. -> water
Answer: (d).water
Question 124. Even a small amount of impurities can affect the conductivity of
  1.    iron
  2.    copper
  3.    ammonia
  4.    calcium
 Discuss Question
Answer: Option B. -> copper
Answer: (b).copper
Question 125. Na₃AlF₆ that melts at 1000 °C is known as
  1.    cryolite
  2.    bauxite
  3.    brine
  4.    sludge
 Discuss Question
Answer: Option A. -> cryolite
Answer: (a).cryolite
Question 126. Aluminum (Al) is being extracted from
  1.    bauxite ore
  2.    ferrous
  3.    iron ore
  4.    copper ore
 Discuss Question
Answer: Option A. -> bauxite ore
Answer: (a).bauxite ore
Question 127. Metals which are high in reactivity series are used to extract
  1.    metals
  2.    oils
  3.    non-metals
  4.    metalloids
 Discuss Question
Answer: Option C. -> non-metals
Answer: (c).non-metals
Question 128. The process of decomposition of a compound into its elements by the passage of electric current is called as
  1.    hydrolysis
  2.    electrolysis
  3.    proteolysis
  4.    catalysis
 Discuss Question
Answer: Option B. -> electrolysis
Answer: (b).electrolysis
Question 129. Hydrogen (H₂) is used for making
  1.    margarine only
  2.    ammonia only
  3.    salts
  4.    margarine and ammonia
 Discuss Question
Answer: Option D. -> margarine and ammonia
Answer: (d).margarine and ammonia
Question 130. Michal Faraday coined the words
  1.    anode only
  2.    cathode only
  3.    electrode
  4.    anode and cathode
 Discuss Question
Answer: Option D. -> anode and cathode
Answer: (d).anode and cathode

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