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Multiple Choice Question
Entropy of a thermodynamic system does not change when the system is used for
(a) conduction of heat from a hot reservoir to a cold reservoir
(b) conversion of heat into work adiabatically
(c) conversion of heat into internal energy isochorically
(d) conversion of work into heat isothermally

Chemistry

Multiple Choice Question
Liquid-liquid sol is known as

(a)

aerosol

(b)

foam

(c)

emulsion

(d)

gel

Mathematics

Multiple Choice Question
Normals at three points P, Q, R on a rectangular hyperbola, intersect at a point on the curve; the centroid of the triangle PQR is
(a) the centre of the hyperbola
(b) a focus of the hyperbola
(c) an extremity of a latus rectum
(d) none of these

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