0.01 M `NH_3` and (0.01 M of 50 mL `NH_3`) + (0.01 M, 25 mL H) from these two solution which has pH more ?

Explanation

In the mixture of (HCl + `NH_3`) after neutralization more `NH_3` left without neutralization so pH decrease.
Initial pH of only base is more pH of only base `gt` (more base + less acid) pH