JEE Mains · Chemistry · STD 11 - 2. structure of atom
Given below are two statements:
Statement I: When an electric discharge is passed through gaseous hydrogen, the hydrogen molecules dissociate and the energetically excited hydrogen atoms produce electromagnetic radiation of discrete frequencies.
Statement II: The frequency of second line of Balmer series obtained from \( He^{+} \) is equal to that of first line of Lyman series obtained from hydrogen atom.
In the light of the above statements, choose the correct answer from the options given below:
- A Both Statement I and Statement II are true
- B Both Statement I and Statement II are false
- C Statement I is false but Statement II is true
- D Statement I is true but Statement II is false
Answer & Solution
Correct Answer
(A) Both Statement I and Statement II are true
Step-by-step Solution
Detailed explanation
\( \frac{1}{\lambda}=RZ^{2}(\frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}}) \) For 1st line of Lyman series in H-atom: \( \frac{1}{\lambda}=R(1)^{2}(\frac{1}{1^{2}}-\frac{1}{2^{2}}) = \frac{3R}{4} \) For 2nd line of Balmer series of \(He ^{+}\)…
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