Question

A glass beaker is fixed with two electrodes. The positive electrode acts as

anode and negative electrode acts as cathode. One third of beaker is filled with

water and few drops of sulfuric acid is added to this water. Two test tubes are

inserted over the electrodes and the electrodes are connected to a battery. Electricity

is passed over a period of time and observations on the level of water in the test tube

is observed.

(i) What type of reaction it is?

(a) Electrolytic decomposition

(b) Photochemical decomposition

(c) Thermal decomposition

(d) None of these

(ii) The ratio of Gas A and Gas B evolved at the electrodes

is,

a) 1:2 (b) 2:1 (c) 1:3 (d) 3:1

Identify the gases A & B.

(iii) Gas A and Gas B are evolved respectively at,

(a) cathode and anode

(b) anode and cathode

(c) only at cathode

(d) only at anode

(iv) Why few drops of acid is added to water in this process?

(v) What happens when a burning candle is brought near the gases ?​

Answer 1

Answer:

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