Q ​If the energy of an electron in the first Bohr orbit of H-atom is -313.6 Kcal/mol , then energy of 
electron in the second orbit will be 

1. -34.84 Kcal/mol
2. -12.5 Kcal/mol
3. -78.4 Kcal/mol
4. 313/6 Kcal/mol