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JEE Main20199 Jan 2019Evening ShiftChemistryStructure of AtomActual

Which of the following combination of statements is true regarding the interpretation of the atomic orbitals? ( A ) An electron in an orbital of high angular momentum stays away from the nucleus than an electron in the orbital of lower angular momentum. ( B ) For a given value of the principal quantum number, the size of the orbit is inversely proportional to the azimuthal quantum number. ( C ) According to wave mech

Options

  1. A( B ) , ( C )
  2. B( A ) , ( B )
  3. C( A ) , ( C )
  4. D( A ) , ( D )

Correct answer

D. ( A ) , ( D )

Step-by-step solution

Statements (B) and (C) are incorrect. For a given value of the principal quantum number, the size of the orbit is directly proportional to the azimuthal quantum number and not inversely proportional. The formula for angular momentum is h 2 π l ( l + 1 ) If the electron is in ground state, n will be 1 and the only azimuthal quantum number value can be 0. If l = 0, angular quantum momentum will also be 0. The plot of ψ Vs r for various azimuthal quantum numbers, shows peak shifting towards higher r value.

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