Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Organic Chemistry
Which of the following transitions are allowed in the normal electronic spectrum of H-atom?
1
4p to 3p
2
4d to 3s
3
4p to 3d
4
More than one of the above
5
None of the above