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Which of the following electron transition in a hydrogen atom will require the largest amount of:
(1) From n-1 to n=2
(2) From n= 2 to n=3
(3) From n= ∞ to n=1
(4) From n=3 to n= 5
Ans: From n-1 to n=2
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Number of orbitats in h sub-shell is: (1) 11 (2) 15 (3) 17 (4) 19 Ans: 11
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