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JEE Main20199 Jan 2019Morning ShiftChemistryStructure of AtomActual

For emission line of atomic hydrogen from n i = 8 to n f = n , the plot of wave number v - against 1 n 2 will be: (The Rydberg constant, R H is in wave number unit)

Options

  1. ALinear with slope - R H
  2. BNon linear
  3. CLinear with slope R H
  4. DLinear with intercept - R H

Correct answer

C. Linear with slope R H

Step-by-step solution

According to Rydberg's equation, 1 λ = v   - = R H Z 2 1 n 1 2 - 1 n 2 2 Z = 1 for H atom = R H × 1 2 ( 1 n f 2 − 1 8 2 ) v ¯ = R H n f 2 − R H 64 slope, m = + R H The curve is linear

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