List of top Chemistry Questions on Bohr’s Model for Hydrogen Atom asked in WBJEE

The hydrides of the first elements in groups $15 - 17$, namely $NH_3, H_2O$ and $HF$ respectively show abnormally high values for melting and boiling points. This is due to

The ionization energy of the hydrogen atom is $13.6\, eV$. The potential energy of the electron in $n = 2$ state of hydrogen atom is

In transforming $0.01$ mole of $PbS$ to $PbSO _{4}$, the volume of ' $10$ volume' $H _{2} O _{2}$ required will be

Under which of the following condition is the relation valid $\mathrm{\Delta }H=\mathrm{\Delta }E+P\mathrm{\Delta }V$ for a closed system?

When 0.001 M Na2SO4 solution is saturated with CaSO4, its conductivity increases from 2.6 x 10^-4 S cm^-1 to 7.0 x 10^-4 S cm^-1. If the molar conductivities of Na⁺ and Ca2⁺ respectively are 50 S cm² mol^-1 and 120 S cm² mol^-1, then the solubility product of CaSO4 is:[Assume that conductivity of water used is negligible.]