Electricity And Chemistry(Chemistry ) Questions and Answers

Question 1. Weak electrolytes include
  1.    weak acids
  2.    weak alkalis
  3.    strong bases
  4.    both a and b
Explanation:-
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 2. Fixed positions of valence electrons makes materials
  1.    conductors
  2.    insulators
  3.    electrodes
  4.    catalysts
Explanation:-
Answer: Option B. -> insulators
Answer: (b).insulators
Question 3. Electrode may not be made up of
  1.    Mercury
  2.    Gold
  3.    Platinum
  4.    Copper
Explanation:-
Answer: Option B. -> Gold
Answer: (b).Gold
Question 4. A covalent liquid which does not conduct electricity is
  1.    strong electrolyte
  2.    non-electrolyte
  3.    weak electrolyte
  4.    a bad insulator
Explanation:-
Answer: Option B. -> non-electrolyte
Answer: (b).non-electrolyte
Question 5. In electrolysis of H₂SO₄ (aq), at anode
  1.    Sulphate ions are discharged
  2.    hydroxide ions are difficult to discharge
  3.    oxygen gas is given off
  4.    SO₂ fumes can be collected
Explanation:-
Answer: Option C. -> oxygen gas is given off
Answer: (c).oxygen gas is given off
Question 6. Most reactive metal in given series is
  1.    tin
  2.    copper
  3.    lead
  4.    silver
Explanation:-
Answer: Option A. -> tin
Answer: (a).tin
Question 7. Sulfuric Acid (H₂SO₄) is an example of
  1.    strong electrolyte
  2.    non-electrolyte
  3.    weak electrolyte
  4.    natural acid
Explanation:-
Answer: Option A. -> strong electrolyte
Answer: (a).strong electrolyte
Question 8. Electrolysis can be useful for
  1.    electroplating
  2.    electrorefinning
  3.    electrocoating
  4.    both a and b
Explanation:-
Answer: Option C. -> electrocoating
Answer: (c).electrocoating
Question 9. Examples of conductors include
  1.    mercury
  2.    Diamond
  3.    sulphur
  4.    phosphorus
Explanation:-
Answer: Option A. -> mercury
Answer: (a).mercury
Question 10. Selective discharge occurs
  1.    if more difference is in the reactivity series
  2.    if low difference is in the activity series
  3.    if more than one type of anions is attracted to cathode
  4.    if more than one type of anions or Cations are attracted to the cathode or anode
Explanation:-
Answer: Option D. -> if more than one type of anions or Cations are attracted to the cathode or anode
Answer: (d).if more than one type of anions or Cations are attracted to the cathode or anode
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