Answer the question given below:
 
A teacher gives the following salts:

i. Sodium sulphate \(Na_2SO_4\)
ii. Ammonium nitrate \(NH_4NO_3\)
iii. Sodium acetate \(CH_3COONa\)

Determine their nature based on parent acid and base.
 
i. Sodium sulphate is:
 
ii. Ammonium nitrate is formed from:
 
iii. Sodium acetate is fromed from:
 
iv. Which salt will have pH greater than \(7\)?