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Question

When the electron jumps from $$5^{th}$$ orbit to ground state, the number of spectral lines produced in the hydrogen spectrum is:


A
5
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B
10
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C
20
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D
1
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Solution

The correct option is B $$10$$
Number of spectral lines from $$n_1$$ to $$n_2$$:

= $$\displaystyle\dfrac{(n_2 - n_1 + 1)(n_2 -n _1)}{2}$$

$$n_1 = 1$$
$$n_2 = 5$$

Number of spectral lines $$=\displaystyle\dfrac{5\times(5-1)}{2}$$
                                          $$= 10$$

Chemistry

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