NEET 2016 Phase 2 | Properties of Matter Question 31 | Physics

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

Three liquids of densities $$\rho $$₁, $$\rho $$₂ and $$\rho $$₃ (with $$\rho $$₁ > $$\rho $$₂ > $$\rho $$₃), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact $$\theta $$₁, $$\theta $$₂ and $$\theta $$₃ obey

$${\pi \over 2} > {\theta _1} > {\theta _2} > {\theta _3} \ge 0$$

0 $$ \le $$ $$\theta $$₁ < $$\theta $$₂ < $$\theta $$₃ < $${\pi \over 2}$$

$${\pi \over 2} < {\theta _1} < {\theta _2} < {\theta _3} < \pi $$

$$\pi > {\theta _1} > {\theta _2} > {\theta _3} > {\pi \over 2}$$

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

A rectangular film of liquid is extended from (4 cm $$ \times $$ 2 cm) to (5 cm $$ \times $$ 4 cm). If the work done is 3 $$ \times $$ 10^$$-$$4 J, the value of the surface tension of the liquid is

0.250 N m^$$-$$1

0.125 N m^$$-$$1

0.2 N m^$$-$$1

8.0 N m^$$-$$1

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100^oC, while the other one is at 0^oC. If the two bodies are brought into contact, then, assuming no heat loss, the final common temperature is

50 ^oC

more than 50 ^oC

less than 50 ^oC but greater than 0 ^oC

0 ^oC

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

A body cools from a temperature 3T to 2T in 10 minutes. The room temperature is T. Assume that Newton's law of cooling is applicable. The temperature of the body at the end of next 10 minutes will be

$${7 \over 4}\,$$ T

$${3 \over 2}$$ T

$${4 \over 3}$$ T

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