NEETPhysicsMechanical Properties of Fluids
Surface tension is exhibited by liquids due to force of attraction between molecules of the liquid. The surface tension decreases with an increase in temperature and vanishes at boiling point. Given that the latent heat of vaporisation for water (L v ) = 540 k cal kg –1 , the mechanical equivalent of heat (J) = 4.2 J cal –1 , density of water (ρ w ) = 103 kg l –1 , Avogadro’s Number (N A ) = 6.0 × 10 26 k mole –1 , a
Options
- A6.6×10 -2 Nm
- B3.3×10 -2 Nm
- C3.3×10 -3 Nm
- D6.6×10 -3 Nm
Correct answer
A. 6.6×10 -2 Nm
Step-by-step solution
Correct Option is : (A) 6.6×10 -2 Nm