Which of the following plots of radial-probability function $4\mathrm{\pi }{\mathrm{r}}^2{\mathrm{\psi }}^2$ is/are correct

(i)

(ii)

(iii)

(iv)

• A

  Only i
• B

  ii and iii
• Correct answer
  C

  i and iii
• D

  all

Solution

(i) and (iii) are correct graph according to their orbitals 1s & 3s respectively.

Graph of 2s: 

Graph of 3p:

(i) - (iv) - As all graphs for $4\mathrm{\pi }{\mathrm{r}}^2{\mathrm{\Psi }}^2$ v/s r start from origin. So it is incorrect.

Hence, the correct answer is option: 'C'.