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Q.

According to Bohr’s theory

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a

when a required amount of energy is supplied to an electron in an atom it jumps from lower orbit to higher orbit and remains there

b

when a required amount of energy is supplied to an electron in an atom it jumps from lower orbit to higher orbit and remains there for very short interval of time and returns back to lower orbit, radiating energy

c

the angular momentum of an electron is proportional to its quantum number, n

d

the angular momentum of an electron is independent of its quantum number, n

answer is B, C.

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Detailed Solution

Statements (1) and (4) are incorrect.

(1) The excited electron has a tendency to return back to lower energy state.

(4)  Angular momentum =nh2π

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