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A particle of mass m is moving in a horizontal circle with uniform speed v. when it moves from one point on the circle to a diametrically opposite point, its

(a) Kinetic energy changes by mv².
(b) Kinetic energy does not change
(c) Linear momentum changes by 2mv
(d) Linear momentum does not change.

Chemistry

The arsenious sulphide solution has negative charge. The coagulating power of precipitating it is of
(a) 0.1 N Zn(NO₃)₂ (b) 0.1 Na₃PO₄ (c) 0.1 N ZnSO₄ (d) 0.1 N AlCl₃

Mathematics

If both the roots of the equation exceed 3, then

(a) a<1 (b) a>11/9 (c) a>3/2 (d) a<5/2

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