Electrons with a kinetic energy of 6.023 x 10⁴ J/mol are evolved from a surface of a metal, when it is exposed to radiation of wavelength of 600 nm, The minimum amount of energy required to remove an electron from the metal atom is <br>

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