Electrochemistry(General Knowledge > General Science ) Questions and Answers
Question 1. Electrochemistry deals with
electric energy
chemical energy
only a
both a & b
Explanation:-
Answer: Option D. -> both a & b
Question 2. What is a cathode?
It is the electrode where oxidation takes place.
It is the electrode where reduction takes place.
It is an aqueous solution containing an electrode.
It is the salt bridge that connects half-cells.
Explanation:-
Answer: Option B. -> It is the electrode where reduction takes place.
Question 3. What is a reducing agent?
It is the species that gets reduced -- gains electrons.
It is the species that gets oxidized -- loses electrons.
It is the species that creates electrons.
It is the species that destroys electrons.
Explanation:-
Answer: Option B. -> It is the species that gets oxidized -- loses electrons.
Question 4. The substances which give different colour indifferent medium and thus indicate the presence of acid or base in a solution are called _______
dye
indicator
reagent
chemical
Explanation:-
Answer: Option B. -> indicator
Question 5. What is a galvanic (voltaic) cell?
It is a cell that destroys electrons on one side and creates electrons on the other side.
It is a cell that contains only one metal bar and one aqueous ion solution.
It is a type of battery that drives a redox reaction when electricity is applied.
It is a type of battery that generates an electrical current from redox reactions.
Explanation:-
Answer: Option D. -> It is a type of battery that generates an electrical current from redox reactions.
Question 6. An electroanalytical / electrochemical techniques uses ________
working electrode
reference electrode
both reference and working electrodes
working, reference and counter electrodes
Explanation:-
Answer: Option B. -> reference electrode
Question 7. What is a half-reaction?
It is a reaction at equilibrium where half of the substances are reactants and half of the substances are products.
It is the reaction that occurs when the switch of a galvanic cell is open.
It shows EITHER the reduction component or the oxidation component of a redox reaction.
It shows BOTH the reduction and oxidation components of a redox reaction.
Explanation:-
Answer: Option C. -> It shows EITHER the reduction component or the oxidation component of a redox reaction.
Question 8. Oxidation occurs at the
anode
cathode
Explanation:-
Answer: Option A. -> anode
Question 9. What occurs to the mass of copper electrode in the following reaction?Zn/Zn2+ // Cu2+/Cu
increases
decreases
remains the same
None of these
Explanation:-
Answer: Option A. -> increases
Question 10. WHICH WAY DO THE ELECTRON FLOW IN A GALVANIC CELL
