Chemistry Class 12 Chapter 3 Intext Solutions. We covered all the Chemistry Class 12 Chapter 3 Intext Solutions in this post for free so that you can practice well for the exam.
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Chemistry Class 12 Chapter 3 Intext Objective with Solutions for Students
The passage of an electric current through a conducting liquid causes:
(a) Galvanic corrosion.
(b) Evaporation.
(c) Physical reaction.
(d) Chemical reaction.
Option d – Chemical reaction
Which one among the following metals is more reactive than hydrogen?
(a) Mercury.
(b) Copper.
(c) Silver.
(d) Tin.
Option d – Tin
When items of jewelry made of metals such as copper or nickel are placed in a solution having a salt of gold, a thin film of gold is deposited by:
(a) Cooling to below 0°C.
(b) Heating above 100°C.
(c) Passing an electric current.
(d) Just keep it for 10 min.
Option c – Passing an electric current
The conduction of electricity through the electrolyte solution is due to:
(a) The movement of molecules of the electrolyte.
(b) The movement of ions of the electrolyte.
(c) The movement of separate atoms.
(d) The movement of particles of the solvent.
Option b – The movement of ions of the electrolyte
When a spoon is to be electroplated with nickel, the spoon is:
(a) Dipped in a nickel sulfate solution.
(b) Made the anode and a pure nickel rod the cathode.
(c) Made the cathode and a pure nickel rod the anode.
(d) Coated with nickel sulfate and dried.
Option c – Made the cathode and a pure nickel rod the anode
When two plates of different metals are placed in an electrolyte, the developed emf between them depends on:
(a) The type of electrolyte.
(b) The distance between the plates.
(c) The position of the two metals in the electrochemical series.
(d) All of the above.
Option b – The distance between the plates
The working of a dry cell is based on:
(a) Decomposition reaction.
(b) Spontaneous oxidation-reduction reaction.
(c) Combination reaction.
(d) Electrolysis.
Option d – Electrolysis
The internal resistance of a dry cell is:
(a) Equal to that of an electrolytic cell.
(b) Smaller than that of an electrolytic cell.
(c) Higher than that of an electrolytic cell.
(d) Zero.
Option c – Higher than that of an electrolytic cell
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