Question

a salt whose aqueous solution will have a ph more than 7 will be
a.K2CO3
b.K2SO4
c.NACL
d.NH4Cl

Answer 1

Here is your answer

The salt which has pH more than 7 will be basic.

Here, K2CO3 is basic salt so its pH is more than 7

because, KOH+ H2CO3----> K2CO3+ H2O
it means K2CO3 can be formed by this reaction.
Here KOH is strong base and H2CO3 is weak acid so it will form basic salt


Hope it is useful

Answer 2

(a) K2CO3

Explanation :

H2CO3 (carbonic acid is weak acid)

KOH (Potassium hydroxide is a strong base)

weak acid + strong base = salt (base strong pH is above 7)