In an experiment on photoelectric effect, the slope of the cut-off voltage versus frequency of incident light is found to be `4.12 xx 10^-15 Vs`. Calculate the value of Planck's constant.

For photoelectric effect in a metal, the figure shows the plot of cut off voltage versus frequency of incident radiations. Calculate (a) the threshold frequency (b) the work function for given metal.

The osmotic presure of a solution containing 9.2 g of a substance (molar mass=176) ion 302 ml of solution was found to be 4.1 atmosphere at 15.5^@C . Calculate the value of solution constant.

The figure shows the stopping potential for the phototelectron versus (1/lambda) graph for two metals A and B, lambda being the wavelength of incident light How is the value of Planck's constant determined from the graph?

A ray of light of frequency of 5 xx 10^(14)Hz is passed through a liquid.the wavelength of light measured inside the liquid is found to be 450 xx 10^(-9) m .Calculate refractive index of the liquid.

The decomposition of hydrogen peroxide in the presence of iodide ion has been found to be first order with respect to H_2O_2 with rate constant k is 1.01 xx 10^(-2) min^(-1) . Calculate the rate of reaction when [H_2O_2] = 0.15 mol L^(-1)