Question

Why does soap decrease the surface tension of water?

Answer 1

Answer:

by forming colliod they reduce surface tension

Answer 2

$\huge\fcolorbox{pink}{red}{Answer-:}$

Soap molecules are composed of long chains of carbon and hydrogen atoms. This separates the water molecules from each other. Since the surface tension forces become smaller as the distance between water molecules increases, the intervening soap molecules decrease the surface tension.