MCQ
By adding soluble impurity in a liquid, angle of contact
  • decreases
  • B
    increases
  • C
    remains unchanged
  • D
    first increases and then decreases.

Answer

Correct option: A.
decreases
(a) : By adding soluble impurity, angle of contact decreases.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

It is easier to spray water to which soap is added because addition of soap to water
A wire $P Q$ has length $4.8 m$ and mass $0.06 kg$. Another wire $Q R$ has length $2.56 m$ and mass $0.2 kg$. Both wires have same radii and are joined as a single wire. This wire is under tension of $80 N$. A wave pulse of amplitude $3.5 cm$ is sent along the wire $P Q$ from end $P$. The time taken by the wave to reach the other end of single wire is (No power is dissipated during propagation)
A stretched string tied between two rigid supports vibrates with a frequency double the fundamental frequency. The point midway between the supports is
Two coils $A$ and $B$ are placed in a circuit. When current in the coil $A$ changes by $0.8 A$ the magnetic flux in coil $B$ changes by $0.16 Wb$. The mutual inductance between the coils is
A particle is performing S.H.M. starting from extreme position. Graphical representation shows that, between displacement and acceleration, there is a phase difference of
A rectangular block of mass ' $M$ ' and cross-sectional area ' $A$ ' floats on a liquid of density ' $\rho$ '. It is given a small vertical displacement from equilibrium, it starts oscillating with frequency ' $n$ ' then
In Young’s double slit experiment, the two coherent sources have different intensities. If the ratio of maximum intensity to the minimum intensity in the interference pattern produced is 25:1. What was the ratio of intensities of the two sources?
A sonometer wire vibrates with three nodes and two antinodes. The corresponoling mode of vibration is
According to De-Broglie, the waves are associated with ______ 
10 A current is flowing in two straight parallel wires in the same direction. Force of attraction between them is $1 \times 10^{-3} N$. If the current is doubled in both the wires the force will be