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Sch 101: Inorganic Chemistry Question Paper

Sch 101: Inorganic Chemistry

Course:Bachelor Of Science In Industrial Chemistry

Institution: University Of Nairobi question papers

Exam Year:2016

UNIVERSITY OF NAIROBI
FIRST YEAR EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE
DATE: 13TH DEC 2016 TIME: 9.00A.M-11.00A.M
ANSWER ALL QUESTIONS
(Useful constant: c=3.0 x 108 m/s, h=6.63 x 10-23 Js, RH=1.1 X 10-7 m-1)

1. a)Briefly describe the meaning of the following terms:
Zeeman effect
Hamiltonian operator
Work function
Probability density function

(12 marks)
b) Compare the energy of a mole of photons of orange light (625) with the energy
of amole of photons of microwave radiation having a frequency of 2.5 Ghz.
Show which has a greater energy ? (8 marks)

2. a)The lyman series of spectral lines for the H atom , in the ultraviolet region,
arises from transition from higher levels to n=1.Calculate the frequency and
wavelength of the least energetic line in this series. (10 marks)

b)Using postulate of the Bohr theory , derive an expression to show that the Bohr
Orbits are quantized. (8marks)

c)State the THREE non-derivable fundamental postulate upon which quantum
mechanics is based in the treatment of the atomic electron. (6 marks)

3 a) Using the spdf notation.Write down the ground state electron configuration for:
1)Copper ion ,Atomic number of Cu is 29.
2)Chromium.Atomic Numberof Cr is 24
b) Compare the 3 elements C,O, and Si.With brief explanations for each,
answer the following question:
1) Place them in order of increasing atomic radius.
2) which has the largest ionization energy?
3)Which has the more negative electron affinity,O or C?

4 a) Using a molecular orbital energy level diagram,predict if Li-2 exists.(5 marks)
b)Deduce the molecular geometry of SF6 in terms of hybridization. Atomic
number of Sulphur in 16.

Sch 101: Inorganic Chemistry Question Paper

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