Please answer only 4 and 6 with brief explanation. Chemical effects of electric current

Solution:
Q4.
Option a is correct

1. Rain water forms by evaporation of water available on earth's surface. This evaporation causes water vapour to reach the clouds leaving all the impurities.
2. Now, this water condenses to form water droplets which joins together and precipitate on Earth.
3. Thus, rain water is the purest form of water.
4. This rain water when mixes with impurities which are in the form of ions makes it a good conductor of electricity.

Q6.  option b is correct

Here we have been given in the assertion that water can be easily decomposed into hydrogen (H) and oxygen gas by heating it to a very high temperature. This reaction is also known or designated as the electrolysis of water. The electric current supplies the energy required for the breaking of the covalent bonds in water and splitting it into its constituent elements.

The reason here is given that the chemical effects of the electric current here are used to decompose the various chemical compounds into their elements.

The reason is correct here but it is not the correct explanation of the above-given assertion.