out of pchloroaniline and meta chloroaniline which is more basic and why?

Para-Chloroaniline is more basic than meta-chloroaniline.

If we draw the resonance structure os chloro aniline we see that Para-chloroaniline can more easily abstract a proton which makes it a more basic.

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para is more basic than meta choloro aniline...draw the structures.

since chlorine is ortho - and para- directing group (which means it increases electron density at these two positions), hence para isomer of chloroaniline will be more basic because the NH₂ group of this isomer will be having more electron density , thus a good electron pair donor  hence the more basic it will be.