How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2?
As an electron makes a transition from an excited state to the ground state of a hydrogen - like atom/ion :
The standard Gibbs energy change at 300 K for the reaction 2A⇔B+C is 2494.2J. At a given time, the composition of the reaction mixture is [A]=21,[B]=2and[C]=21. The reaction proceeds in the :
The equation of the circle passing through the foci of the ellipse 16x2+9y2=1, and having centre at (0, 3) is
The number of points, having both co-ordinates as integers, that lie in the interior of the triangle with vertices (0, 0), (0, 41) and (41, 0), is :
Two stones are thrown up simultaneously from the edge of the cliff 240 m high with initial speed of 10 m/s and 40 m/s respectively. Which of the following graph best represents the time variation of relative position of the second stone with respect to the first ?
(Assume stones do not rebound after hitting the ground and neglect air resistance, take g=10m/s2)
(The figure are schematic and not drawn to scale)
If the coefficients of x3and x4in the expansion of (1+ax+bx2)(1−2x)18in powers of x are both zero, then (a, b) is equal to