Question

. Draw a well labelled diagram of passing current through water and answer the

following questions:

(i)

Name the electrodes.

(ii) Name the material used to make caps of electrodes.

(iii) Name the gases formed.
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Answer 1

Required answer :

When electric current is passed through water, It decomposes to give oxygen and hydrogen.

Reaction :

$\sf 2H_2O (liq.) \xrightarrow{Electricity}} 2H_2(g) \ + \ O_2(g).$

• When The electric current is passed through water (H2O) then it decomposes to give oxygen gas and hydrogen gas.

• Water is the best conductor of electricity.

• Water is good conductor of electricity, therefore we are told not to touch circuit, switch and electricity boards when our hands are wet or we are standing on wet surface.

• The good insulators are rubber, wood and plastic.

• The labelled diagram of current passing through water is given in the attachment.

Answer 2

testing conductor of electricity in lemon juice or vinegar