Step 1:
\(a)
\NaNO3 is neutral in nature.
\NaNO3 contains sodium ion Na+ and NO3-.
\Na+ is a spectator and NO3- is the conjugate base of strong base.
\Fe(NO3)2 is acidic in nature.
\Fe is acidic due to metallic nature.
\NO3- is the conjugate base of strong base.
\Fe(NO3)2 is acidic in nature than NaNO3.
\(b)
\KBr is neutral in nature.
\KBr contains sodium ion K+ and Br-.
\K+ and Br- is neither base nor acid.
\KBrO is basic in nature.
\BrO- is cation of strong base.
\KBr is more acidic in nature than KBrO.
\(c)
\CH3NH3Cl is weak acid.
\CH3NH3Cl contains CH3NH2Cl- and H+
\BaCl2 is neutral in nature.
\BaCl2 contains sodium ion Br+ and Cl-.
\CH3NH3Cl is more acidic in nature than BaCl2.
\(d)
\NH4NO2 is neutral in nature.
\NH4NO2 is formed by NH4OH and HNO2.
\NH4OH is a weak base and HNO2 is a weak acid.
\NH4NO3 is acidic in nature.
\NH4NO3 is formed by NH4OH and HNO3.
\NH4OH is a weak base and HNO3 is a strong acid.
\NH4NO3 is more acidic in nature than NH4NO2.
\Solution:
\(a) Fe(NO3)2 is acidic in nature than NaNO3.
\(b) KBr is more acidic in nature than KBrO.
\(c) CH3NH3Cl is more acidic in nature than BaCl2.
\(d) NH4NO3 is more acidic in nature than NH4NO2.
\