Question

Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
(a) What will be the action of solution A on litmus?
(b) What will be action of solution B on litmus?
(c) Name any two substances which can give solutions like A.
(d) Name any two substances which can give solutions like B.
(e) What sort of reaction takes place when solution A reacts with solution B?

Answer 1

(a) As solution A is a basic solution, it would turn red litmus blue.

(b) As solution B is an acidic solution, it would turn blue litmus red.

(c) Sodium hydroxide and household ammonia can give solutions similar to solution A.

(d) Dilute hydrochloric acid and citric fruit juice can give solutions similar to solution B.

(e) When solution A (a base) reacts with solution B (an acid), a neutralisation reaction takes place, producing a salt and water.