Question
A solution M turns blue litmus red while another solution N turns red litmus blue. In the above context answer the following questions :
(i) What do M and N must contain?
(ii) When M and N are mixed together, name one of the product formed.
(iii) When M and N are mixed together, name the other product formed.
(iv) If a piece of magnesium was put into a solution M, name the gas evolved.

Answer

(i) M contains Hydronium ion and N contains Hydroxyl ion
(ii) Salt
(iii) Water
(iv) Hydrogen

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