696 Words3 Pages

According to the Bohr model of hydrogen atom, the kinetic and potential energies of the electrons vary as .......... ..and... distance of electron from the nucleus. respectively. where r is the The square of the wavefunction, y}, gives us the Absorption of a given amount of energy gives rise to a larger increase in entropy the the initial temperature. Orbital energies in multi-electron atoms are mere difﬁcult to calculate due to the additional Select the correct answers from the following multiple choice questions. Each .y...~4o‘m: correct answer carries 1.0 mark and for each wrong answer 0.25 marks will be deducted.

Probability density for 1s orbital of hydrogen atom is maximum at (a) r 1 do (in) r = 0 (c) r = 2:10 (d) r = 0.5 no The RDF for 1s orbital of hydrogen atom has maximum value at (a) r = an 0:) r i G (0) r ‘ 290 id) F = 0-5 do
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(a) 0 (13} C (M (V) M) (vii) (viii) (c) B (d) N

The numerical values of a. wavefunction for a one-electron atom at three values of r are {Mr = do) = 0.92. w(r= 2:20) = -0.13 and [Mr = San) = 0.20. Which of the following wavefunctions are consistent with this description? (3) 15 (b) 25 (c) 3.9 (Ci) 2p (e) 31.? [0 3a' which of the following orbitals of F is closer in energy to the 1s orbital of hydrogen? (a) 1 0?. (b) 25 (c) 2P (d)

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