Sexual reproduction leads to

During the change of $O_2$ to $O_2^-$ ion,the electron adds to which one of the following orbitals?

$A$ hollow insulated conducting sphere is given a positive charge of $10\,\mu C$. What will be the electric field at the centre of the sphere if its radius is $2\,m$?

The chemical entities present in the thermosphere of the atmosphere are:

An ideal gas is expanding such that $PT^2 = \text{constant}$. The coefficient of volume expansion of the gas is (in $/T$)

The molecular interactions responsible for hydrogen bonding in $HF$ are: