A seed cut into two halves and immersed in `0.1 %` triphenyl tetrazolium chloride solution . Its viability is indicated by development of colouration

A weak acid is 0.1% ionised in 0.1M solution. Its ionisation constant is :

An equi-convex lens of focal length F in air is is cut into two halves along the plane perpendicular to the optic axis. One of the halves is placed between a fixed object and a screen separated by distance of 90 cm . Two images are formed on the screen for two different positions of the lens with magnification 2 and 1/2 respectively. Find the value of F . what would be the value of the focal length of the equiconvex lens if the lens is immersed in water ? Refractive index of the material of the lens is 1.5 and that of water is mu_w=4//3 .

The solubility of AgCl is 1xx10^(-5)mol//L . Its solubility in 0.1 molar sodium chloride solution is

The solubility of AgCl is 1xx10^(-5)mol//L . Its solubility in 0.1 molar sodium chloride solution is