Q10.5Multiple choice
The angle of contact at the interface of water -glass is 0°, Ethylalcohol-glass is 0°, Mercury-glass is 140° and Methyliodide- glass is 30°. A glass capillary is put in a trough containing one of these four liquids. It is observed that the meniscus is convex. The liquid in the trough is
- (a)water
- (b)ethylalcohol
- (c)mercury
- (d)methyliodide.