A. 2.3125 X 10-19 J
B. 3 X 10-19 J
C. 6.02 X 10-19 J
D. 6.62 X 10-34 J
The wavelengths of electron waves in two orbits is 3 : 5. The ratio of kinetic energy of electrons will be
How many electrons are present in the M shell of an atom of an clement with atomicnumber 24 (Z = 24) ?
5.85 gms of NaCl (Mol. wt. 58.5) is dissolved in water and the solution made up to 500ml; the molarity of the solution will be
The quantum number which explains the line spectra observed as doublets in case of hydrogen and alkali metals and doublets and triplets in case of alkaline earth metals is
When the same amount of zinc is treated with excess of H2SO4 and with excess NaOH, the ratio of the volume of H2 evolved is
The gas that is used for sterilizing water is
In photoelectric effect, if the energy required to overcome the attractive forces on the electron,(work functions) of Li, Na and Rb are 2.41eV, 2.30eV and 2.09eV respectively, the work function of ‘K’ could approximately be in eV