Question

$N{a}^{+}$ is coloured.

If the given statement is correct enter 1 else enter 0.

Answer 1

$N{a}^{+}$ is white in colour.

The electronic configuration of $N{a}^{+}$ is $1s^{2}2s^{2}2p^6$ and in excited state, it is $1s^{2}2s^{2}2p^{5}3s^1$.
In order to absorb visible light, an electron would have to move to a higher energy orbital . The difference in energy of the orbitals would have to equal the energy of a visible wavelength photon. For p orbital to s orbital shift, a much higher energy is needed and would correspond to UV light. Since there is no absorption of visible light, $N{a}^{+}$ ion is white and gives colourless aqueous solution.