Hydrogen peroxide oxidises [Fe(CN)6]4− to [Fe(CN)6]3− in acidic medium but reduces [Fe(CN)6]3− to [Fe(CN)6]4− in alkaline medium. The other products formed are, respectively
Let O be the vertex and Q be any point on the parabola,x2=8y. It the point P divides the line segment OQ internally in the ratio 1 : 3, then the locus of P is :
Distance of the centre of mass of a solid uniform cone from its vertex is Z0. If the radius of its base is R and its height is h then Z0 is equal to :
A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0∘C. As it does so, it absorbs 208J of heat. The values of q and w for the process will be:
(R = 8.314 J/mol K) (l 7.5 = 2.01)
If the vectors AB=3i^+4k^ and AC=5i^−2j^+4k^are the sides of a triangle ABC, then the length of the median through A is
At present, a firm is manufacturing 2000 items. It is estimated that the rate of change of production P w.r.t. additional number of workers x is given by
The supply voltage to a room is 120 V. The resistance of the lead wires is 6 Ω A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb?