Chapter 2: Electrochemistry Chemistry For High School - Grade 9(Chemistry ) Questions and Answers

Question 1. The process in which substance gains electrons is called
  1.    oxidation
  2.    hydrogenation
  3.    sublimation
  4.    reduction
Explanation:-
Answer: Option D. -> reduction
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. The electrolyte used for tin plating is
  1.    sulphide ore
  2.    stannous sulphate
  3.    hydrogen sulphate
  4.    sodium chloride
Explanation:-
Answer: Option B. -> stannous sulphate
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. Corrosion can be prevented by
  1.    Alloying
  2.    Tinning
  3.    Galvanizing
  4.    all of above
Explanation:-
Answer: Option D. -> all of above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. On an industrial scale, sodium metal is prepared by electrolysis of fused
  1.    NaOH
  2.    NaCl
  3.    NaO
  4.    NH3
Explanation:-
Answer: Option B. -> NaCl
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. An electrolytic cell uses electrical energy to drive
  1.    chemical reaction
  2.    physical reaction
  3.    no reaction
  4.    biochemical reaction
Explanation:-
Answer: Option A. -> chemical reaction
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. The elements whose oxidation number is increased are
  1.    reduced
  2.    hydrogenated
  3.    oxidized
  4.    oxygenated
Explanation:-
Answer: Option C. -> oxidized
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. Loss of hydrogen atoms by an element is called
  1.    hydrogenation
  2.    oxidation
  3.    reduction
  4.    sublimation
Explanation:-
Answer: Option B. -> oxidation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. The oxidation state of group IIIA metals is
  1.    -3
  2.    3
  3.    0
  4.    1
Explanation:-
Answer: Option B. -> 3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. In a dry cell, the anode is made up of
  1.    zinc
  2.    calcium
  3.    sodium
  4.    graphite
Explanation:-
Answer: Option D. -> graphite
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. An electrochemical cell is also called
  1.    battery cell
  2.    galvanic cell
  3.    cell
  4.    chargeable cell
Explanation:-
Answer: Option B. -> galvanic cell
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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