Which of the following will give a solution having pH less than 7?
A salt is dissolved in water and the pH of this salt solution is measured with a universal indicator paper. If the pH of solution is less than 7, the salt is most likely to be :
(a) CH3COONa
(b) Na2CO3
(c) KCl
(d) NH4Cl
Give one example each of a salt which gives an aqueous solution having :
(a) pH less than 7
(b) pH equal to 7
(c) pH more than 7