46. Surface tension may be defined as
(a) The work done per unit area in increasing the surface area of a liquid under isothermal condition
(b) The work done per unit area in increasing the surface area of a liquid under adiabatic condition
(c) The work done per unit area in increasing the surface area of a liquid under both isothermal and adiabatic conditions
(d) Free surface energy per unit volume
Ans. a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a