14. What is the shape when a non-wetting liquid is placed in a capillary tube
(a) Concave upward
(b) Convex upward
(c) Concave downward
(d) Convex downward
Ans. (b) Since for such liquid (Non-wetting) angle of contact is obtuse.
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a