Coagulating value of the electrolytes $\mathrm{AlCl}_{3}$ and $\mathrm{NaCl}$ for are 0.09 and 50.04 respectively. The coagulating power of is times the coagulating power of . The value of is ___________.

The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ___________.

Gem stones, paints, smoke, cheese, milk, hair cream, insecticide sprays, froth, soap lather

The standard entropy change for the reaction

4Fe(s) + 3O₂(g) $\to$ 2Fe₂O₃(s) is $-$550 J K^$-$1 at 298 K.

Standard enthalpy of vapourisation for $\mathrm{CCl}_4$ is $30.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$. Heat required for vapourisation of of at constant temperature is ________ .

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

Consider an imaginary ion ${ }_{22}^{48} \mathrm{X}^{3-}$. The nucleus contains ''% more neutrons than the number of electrons in the ion. The value of 'a' is _______________. [nearest integer]

Number of moles of methane required to produce $22 \mathrm{~g} \mathrm{~CO}_{2(\mathrm{~g})}$ after combustion is moles. The value of is _________.

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

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]

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)

If the uncertainty in velocity and position of a minute particle in space are, 2.4 $\times$ 10^$-$26 (m s^$-$1) and 10 (m) respectively. The mass of the particle in g is ____________. (Nearest integer)

The number of electrons present in all the completely filled subshells having $\mathrm{n}=4$ and $\mathrm{s}=+\frac{1}{2}$ is _______.