List of top Chemistry Questions asked in LPUNEST

Variation of \(\log_{10} K\) with \(\dfrac{1}{T}\) is shown by the following graph in which straight line is at \(45^\circ\). Hence \(\Delta H^\circ\) is:
Root mean square velocity of a gas is tripled when the temperature is
A real gas deviates least from ideal behaviour at:
The ratio of velocities of two photons of wavelengths \(2000\,\text{\AA}\) and \(4000\,\text{\AA}\) is
The solubility of \(N_2(g)\) in water exposed to the atmosphere, when the partial pressure is \(593\,\text{mm}\), is \(5.3 \times 10^{-4}\,\text{M}\). Its solubility at \(760\,\text{mm}\) and at the same temperature is
The degree of dissociation \(\alpha\) of the reaction \(N_2O_4(g) \rightleftharpoons 2NO_2(g)\) can be related to \(K_p\) as
The half-life of a first order chemical reaction is \(60\) hrs at \(300\,\text{K}\). As temperature is increased to \(310\,\text{K}\), half-life becomes \(40\) hrs. Determine the half-life of the same reaction at \(350\,\text{K}\).
The enthalpy of vaporization of a liquid is \(30\,\text{kJ mol}^{-1}\) and entropy of vaporization is \(75\,\text{J K}^{-1}\text{ mol}^{-1}\). The boiling point of the liquid at \(1\,\text{atm}\) is
\(122.4\,\text{L}\) of \(O_2\) at STP has same mass as
According to Freundlich adsorption isotherm, which of the following is correct?
\(MnO_4^- + Br^- + H_2O \rightarrow MnO_2 + BrO_3^- + OH^-\). In the balanced reaction, the coefficients of \(MnO_4^-\), \(BrO_3^-\) and \(OH^-\) are respectively:
In hydrogen atom, energy of electron in ground state is \(13.6\,\text{eV}\), then energy of electron in second excited state is
Octet rule is not followed in
After rounding \(1.245\) and \(1.235\) to three significant figures, we will have their answers respectively as
A manifestation of surface tension is: