Is the pH greater than, equal to, or less than 7 after neutralization of each of the following pairs of acids and bases?

(a) CsOH and HNO2

(b) NH3 and HBr

(c) KOH and HClO4

Does the pH increase, decrease, or remain the same on addition of each of the following?
(a) NH4NO3 to an NH3 solution
(b) Na2CO3 to an NaHCO3 solution
(c) NaClO4 to an NaOH solution

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