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Sticky Note
The Lymen series in hydrogen spectrum is produced when electron fall to?
  1. n=1
  2. n=2
  3. n=3
  4. n=4
Explanation

Energy Level:

The final destination for the electron is the first principal energy level, known as the ground state (n=1). 

Source:

The electron must have been in a higher energy level, such as n=2, n=3, n=4, and so on, before making the transition to n=1. 

Spectrum Region:

The energy released during these transitions is high, resulting in spectral lines that fall within the ultraviolet (UV) region of the electromagnetic spectrum. 

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اس سوال کو وضاحت کے ساتھ پڑھیں

  1. 10–20 minutes
  2. 30–60 minutes
  3. 2–4 hours
  4. 12–24 hours
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  1. Vertical drop fall
  2. Glacis fall
  3. Montague type fall
  4. Inglis fall
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آکسیجن زیادہ تر عناصر کے ساتھ عمل کرکے دو عنصری مرکبات بناتی ہے جنہیں کیا کہتے ہیں؟
  1. Bases
  2. Oxides
  3. Acids
  4. None of these
اس سوال کو وضاحت کے ساتھ پڑھیں

پانی اور کاربن ڈائی آکسائڈ کے سالمے مل کر کیا بناتے ہیں؟
  1. Nitric acid
  2. Carbonic acid
  3. Sulfuric acid
  4. None of these
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