because in AlCl³ ,Al is positively charged

since Al+ Cl-³

because only 3election is present in 3s² 3p¹ orbital,so it give its electron to chlorine and form

Al+. since chlorine has only 1 electron left to complete its octate so 3 chlorine atom combine with 1 aluminium atom to form Al+ Cl-³ or Alcl³

so due to positive charge and vacant 3 orbital it exhibit greater power toward negative colloid

while on other side K⁴[Fe(CN⁶)] has no such requirements so it is wrong answer and correct answer is AlCl³

Answer:

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mate here we r focussing on valency...

n i hope u knw hw we calculate the valency...

plzz ask freely if it's again confusing u...