Chemistry

ELECTRICITY AND CHEMISTRY MCQs

Total Questions : 204

Page 1 of 21 pages
Question 1. Weak electrolytes include
  1.    weak acids
  2.    weak alkalis
  3.    strong bases
  4.    both a and b
 Discuss Question
Answer is 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
 Discuss Question
Answer is Option B. -> insulators
Answer: (b).insulators
Question 3. Electrode may not be made up of
  1.    Mercury
  2.    Gold
  3.    Platinum
  4.    Copper
 Discuss Question
Answer is 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
 Discuss Question
Answer is 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
 Discuss Question
Answer is 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
 Discuss Question
Answer is 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
 Discuss Question
Answer is 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
 Discuss Question
Answer is Option C. -> electrocoating
Answer: (c).electrocoating
Question 9. Examples of conductors include
  1.    mercury
  2.    Diamond
  3.    sulphur
  4.    phosphorus
 Discuss Question
Answer is 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
 Discuss Question
Answer is 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