When impurity is added to a liquid, its surface tension
remains same
decreases
first decreases and then increases
increases
Surface Tension of a liquid decreases when impurity is added to it.
How does the surface tension of a liquid vary with an increase in temperature?
(a) Remains same (b) Decreases
(c) Increases (d) No regular pattern is followed
When the pitch of note produced by a harmonium is lowered, then the wavelength of the note :
(a) decreases
(b) first decreases and then increases
(c) increases
(d) remains the same