Question

State the observation made when both blue and red litmus paper were dropped into a mixture of sodium hydroxide and sulphuric acid?

Answer 1

See bro when A Blue litmus paper is kept in acid it changes to red and when red kept in base it turn blue
so according to the q
Sodium Hydroxide is Base
Sulphuric Acid is an acid

Answer 2

blue litmus paper turns red when put into acid solution
red litmus paper turns blue when put into base solution

as sodium hydroxide is a base==>

blue litmus paper=>
when put into acid solution the colour change to red
when put into base solution the colour remains blue

red litmus paper=>
when put into acid solution the colour remains red
when put into base solution the colour changes to blue

as sulphuric acid is an acid==>

blue litmus paper=>
when put into acid solution the colour change to red
when put into base solution the colour remains blue

red litmus paper=>
when put into acid solution the colour remains red
when put into base solution the colour changes to blue
hope it help