5. A siphon in use is demonstrated in the following figure. The density of the liquid flowing in siphon is

1.5 gm/cc. The pressure difference between the point P and S will be

(a) 10⁵ N/m

(b)   2 × 10⁵ N/m

(c)   Zero

(d)   Infinity

Explanation-  (c) As the both points are at the surface of liquid and these points are in the open atmosphere. So both point possess similar pressure and equal to 1 Hence the pressure difference will be zero.