Rohan observes the following while doing an experiment. Solution P Q R S Blue Litmus Red Deep Red No change Mauve Red Litmus No change No change Blue Mauve Which of these is strongly acidic and basic?

Strongly acidic = Q Strongly Basic = R Substance Q turns deep red when added to the blue litmus solution. This indicates substance Q is strongly acidic. The substance R turns the red litmus solution blue. This indicates R is strongly basic. This is because an acidic substance turns blue litmus solution into red, and a basic substance turns red litmus paper into blue. So we can identify the substance with the help of indicators.

Rohan observes the following while doing an experiment. Solution P Q R S Blue Litmus Red Deep Red No change Mauve Red Litmus No change No change Blue Mauve Which two solutions will react to show neutralisation reaction?

A chemical reaction in which acid reacts with base and forms salt and water is known as neutralisation reaction. Solution R is basic, whereas solutions P and Q are acidic. As a result of being acid and base, solutions P and R and Q and R show neutralisation reactions.