Question

3) Read the following paragraph and answer the given questions based on it :
Activity : Dissolve 2 g salt in 500ml pure water. Take 250 ml of this solution in a 500 ml
capacity beaker. Connect two electrical wires to the positive and negative terminals of a power
supply. Remove the insulating cladding from about 2 cm portions at the other ends of the
wires. These are the two electrodes. Fill two test tubes up to the brim with the prepared dilute
salt solution. Invert them on the electrodes without allowing any air to enter. Start the electric
current under 6 V potential difference from the power supply. Observe what happens in the
test tubes after some time.
Questions :
i) In the given activity which reaction is described?
ii) Draw a well-labelled diagram for the given activity.
iii) Which gases are formed near the cathode and anode?​

Answer 1

Answer:

i)Electrolysis of water

ii)Just draw a beaker ( label it based on the material inside it) with two test tubes as electrodes ( label them bases on the material inside them) half immersed in the beaker and connect them with a battery of 6V.

iii) Cathode - Hydrogen

Anode - Oxygen

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