ntoxygen gas will be obtained by electrolysis of fused magnesium oxide at (a) anode (b) cathode (c) any electrode (d) oxygen gas will not be produced. Explain giving reasonsn

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Q. Oxygen and hydrogen gas are produced at the anode and cathode respectively, during the electrolysis of fairly concentrated aqueous solution of:

Q. Statement 1: During the electrolysis of water, the volume of gas obtained at anode is more than the volume of gas obtained at cathode.

Statement 2: Hydrogen is obtained at cathode and oxygen is obtained at anode during the electrolysis of water.

Which of the following statements are correct?

a) The electrolysis of aqueous NaCl produces hydrogen gas at the cathode and chlorine gas at the anode .

b) The electrolysis of a $C u S O_{4}$ solution using Pt electrodes causes the liberation of $O_{2}$ at the anode and the deposition of copper at the cathode .

c) Oxygen and hydrogen are produced at the anode and cathode during the electrolysis of dilute aqueous solution of $H_{2} S O_{4}$ .

d) All electrolytic reactions are redox reactions .

Q. In the electrolysis of water
1. Name the gas collected at anode and cathode.
2. why is the volume of gas collected at one electrode double than the other?
3. what will happen if dil H2SO4 is not added to water

Q. Give the reasons for the following:
(i) Zinc is used in galvanisation and dry cells.
(ii) Nitric acid can be stored in aluminium containers.
(iii) Aluminium oxide cannot be reduced by carbon.
(iv) A neutral gas other than oxygen is formed at the anode during electrolysis of fused alumina.
(v) Extraction of aluminium was very difficult in the beginning.
(vi) Carbon anodes are used in the electrolytic extraction of aluminium.
(vii) Galvanized metal ions should not be used for storing food.

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