The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is :
(a) KCl
(b) K2SO4
(c) K2CO3
(d) KNO3
Phenolphthalein turns basic solution pink. Thus the correct option is K2CO3
A solution turns phenolphthalein indicator pink. The most likely pH of this solution will be :
(a) 6
(b) 4
(c) 9
(d) 7
The aqueous solution of one of the following salts will turn red litmus to blue. This salt is :
(a) potassium sulphate
(b) sodium sulphate
(c) sodium chloride
(d) potassium carbonate