What would you observe when :
(a) blue litmus is introduced into a solution of hydrogen chloride gas,
(b) red litmus paper is introduced into a solution of ammonia in water,
(c) red litmus paper is introduced in caustic soda solution?
What will you observe if Hydrogen chloride gas is passed through blue litmus solution?
State what do you observe when:
Neutral litmus solution is added to alkaline solution.