1.

The ionisation potential of H-atom is \[13.6\,V\]. When it is excited from ground state by monochromatic radiations of \[970.6\,{AA}\], the number of emission lines will be (according to Bohr?s theory)                                          [RPET 1999]

A. 10  
B. 8
C. 6    
D. 4
Answer» D. 4


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