Question : In electro-refining, the pure metal is deposited on
Option 1: vessel
Option 2: electrolyte
Option 3: cathode
Option 4: anode
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Correct Answer: cathode
Solution : The correct answer is the cathode.
The anode is the impure metal to be refined in electrolytic refining, whereas the cathode is a thin strip of high-purity metal. The solution uses metal salt as the electrolyte. When an electric current passes through the electrolyte, pure metal from the anode dissolves, and deposits to form a cathode. Insoluble impurities settle to the anode's bottom and generate anode mud. The soluble impurities are re-incorporated into the mixture.
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Question : If ice floating on water in a vessel melts, the water level in the vessel:
Option 1: Increases
Option 2: Does not change
Option 3: First increases before decreasing
Option 4: Decreases
Question : The degree of dissociation of an electrolyte depends on
Option 1: dilution
Option 2: impurities
Option 3: atmospheric pressure
Option 4: method of dissolution
Question : Which among the following alloys is made up of copper and zinc?
Option 1: Monel Metal
Option 2: Magnalium
Option 3: Rolled Gold
Option 4: Dutch Metal
Question : The non-metal found in the liquid state is
Option 1: Bromine
Option 2: Nitrogen
Option 3: Fluorine
Option 4: Chlorine
Question : In an experiment, it was observed that metal A is 19 times heavier than water and metal B is 9 times heavier than water. In what ratio are metals A and B mixed so that the mixture thus obtained is 15 times heavier than water?
Option 1: 2 : 3
Option 2: 1 : 3
Option 3: 3 : 1
Option 4: 3 : 2
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