Q1. Meniscus of mercury in a capillary is:
(a) concave
(b) convex
(c) plane
(d) cylindrical
Q2. With the rise of temperature, the surface tension of a liquid:
(a) increases
(b) decreases
(c) remains unchanged
(d) none of these
Q3. An oil drop is placed on the surface of water. It will:
(a) remain on the surface as a sphere
(b) remain on the surface as a distorted drop
(c) spread as a thin layer
(d) none of these
Q4. The surface tension phenomenon is the result of the tendency of a system of:
(a) conserve Energy
(b) keep P.E. Minimum
(c) conserve Volume
(d) Keep surface area minimum
Q5. Water drops do not stick to the oily surface due to
(a) lack of adhesive force
(b) surface tension
(c) cannot mix each other
(d) water is lighter than oil
Q6. Newton’s first law is also called as
(a) law of moments
(b) law of inertia
(c) law of energy
(d) law of momentum
Q7. If we want to calculate the pressure of a liquid at the bottom of vessel, the quantity which is not required to determine it, is
(a) height of the liquid column
(b) surface area of the bottom of the vessel
(c) density of the liquid
(d) acceleration due to gravity at the bottom of the vessel
Q8. A man inside an artificial satellite, feels weightlessness because the force of attraction due to earth is
(a) zero at that place
(b) is balanced by the force of attraction due to moon
(c) equal to centripetal force
(d) non-effective due to particular design of the satellite
Q9. Fat can be separated from milk in a cream separator because of:
(a) cohesive force
(a) cohesive force
(b) gravitational force
(c) centripetal force
(d) centrifugal force
Q10. A liquid drop tends to assume a spherical shape because of:
(a) surface tension
(b) viscous force
(c) gravitational force
(d) elastic force
Solution:
S1. Ans.(b)
S2. Ans.(b)
S3. Ans.(c)
S4. Ans.(d)
S5. Ans.(a)
S6. Ans.(b)
S7. Ans.(b)
S8. Ans.(a)
S9. Ans.(d)
S10. Ans.(a)
