Answer: We have
(i) NaCl:

Therefore, it is a neutral solution.
(ii) KBr:

Therefore, it is a neutral solution.
(iii) NaCN:

Therefore, it is a basic solution.
(iv) NH4NO3

Therefore, it is an acidic solution.
(v) NaNO2

Therefore, it is a basic solution.
(vi) KF

Therefore, it is a basic solution.