The number of given orbitals which have electron density along the axis is _________

$\mathrm{p_x,p_y,p_z,d_{xy},d_{yz},d_{xz},d_{z^2},d_{x^2-y^2}}$

The ionization energy of sodium in $\mathrm{~kJ} \mathrm{~mol}^{-1}$, if electromagnetic radiation of wavelength $242 \mathrm{~nm}$ is just sufficient to ionize sodium atom is _______.

Mass of methane required to produce $22 \mathrm{~g}$ of $\mathrm{CO}_2$ after complete combustion is _______ g.

The energy of one mole of photons of radiation of frequency $2 \times 10^{12} \mathrm{~Hz}$ in $\mathrm{J} ~\mathrm{mol}^{-1}$ is ___________. (Nearest integer)

An organic compound gives $0.220 \mathrm{~g}$ of $\mathrm{CO}_{2}$ and of on complete combustion. If the of carbon is 24 then the of hydrogen is __________ . ( Nearest integer)

If the work function of a metal is 6.63 $\times$ 10^$-$19J, the maximum wavelength of the photon required to remove a photoelectron from the metal is ____________ nm. (Nearest integer)

[Given : h = 6.63 $\times$ 10 m s]

If the wavelength for an electron emitted from $\mathrm{H}$-atom is $3.3 \times 10^{-10} \mathrm{~m}$, then energy absorbed by the electron in its ground state compared to minimum energy required for its escape from the atom, is _________ times. (Nearest integer)

Let a common tangent to the curves ${y^2} = 4x$ and ${(x - 4)^2} + {y^2} = 16$ touch the curves at the points P and Q. Then is equal to __________.

Wavenumber for a radiation having 5800 $\mathop A\limits^o$ wavelength is $x \times 10 \mathrm{~cm}^{-1}$ The value of is ________. (Integer answer)

Number of spectral lines obtained in $\mathrm{He}^{+}$ spectra, when an electron makes transition from fifth excited state to first excited state will be

Based on Heisenberg's uncertainty principle, the uncertainty in the velocity of the electron to be found within an atomic nucleus of diameter $10^{-15} \mathrm{~m}$ is ________ $\times 10^9 \mathrm{~ms}^{-1}$ (nearest integer)