The acidity of oxyacids like HNO\(_3\), HClO\(_4\), and HClO\(_3\) depends on the electronegativity of the central atom and the number of oxygen atoms attached to it.
The greater the number of oxygen atoms and the higher the electronegativity of the central atom, the stronger the acid. - HClO\(_4\) is the strongest acid because chlorine is highly electronegative and has the most oxygen atoms attached to it.
HNO\(_3\) is stronger than HClO\(_3\) because the nitrogen atom is more electronegative than chlorine, and nitric acid has more oxygen atoms than chlorous acid.
A substance 'X' (1.5 g) dissolved in 150 g of a solvent 'Y' (molar mass = 300 g mol$^{-1}$) led to an elevation of the boiling point by 0.5 K. The relative lowering in the vapour pressure of the solvent 'Y' is $____________ \(\times 10^{-2}\). (nearest integer)
[Given : $K_{b}$ of the solvent = 5.0 K kg mol$^{-1}$]
Assume the solution to be dilute and no association or dissociation of X takes place in solution.
Inductance of a coil with \(10^4\) turns is \(10\,\text{mH}\) and it is connected to a DC source of \(10\,\text{V}\) with internal resistance \(10\,\Omega\). The energy density in the inductor when the current reaches \( \left(\frac{1}{e}\right) \) of its maximum value is \[ \alpha \pi \times \frac{1}{e^2}\ \text{J m}^{-3}. \] The value of \( \alpha \) is _________.
\[ (\mu_0 = 4\pi \times 10^{-7}\ \text{TmA}^{-1}) \]