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  4. When white light (violet to red) is passed through hydrogen gas at room temperature, absorption lines will be observed in the

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Q. When white light (violet to red) is passed through hydrogen gas at room temperature, absorption lines will be observed in the

Atoms

Solution:

At room temperature all atoms of hydrogen gas are in ground state in which only radiation of ultraviolet region can be absorbed to excite atoms from $n = 1$ to higher energy levels so visible light cannot excite any atom in ground state