Inorganic Chemistry Answers

5. a) By writing molecular orbital configuration for each of following molecules calculate the
bond order and also determine whether it is paramagnetic or diamagnetic.
(i) NO (ii) CO (iii) O2
+
(6)
b) Using suitable examples define gerade and ungerade orbitals. (4)
6. a) The dipole moment of HBr is 2.60  1030 C m and interatomic distance 141 pm. What is
the percentage ionic character of HBr?
(6)
b) Draw all of the stereoisomers of 2,3-butandiol, label meso compounds and pairs of
enantiomer.
(2)
c) What is the predicted magnetic moment of Cu+
and Cu2+ ions in B Unit (Atomic number
of Cu 29)?
(2)
7. a) Given that the spacing of the lines in the microwave spectrum of 24Al1H is constant at
12.604 cm1
. Calculate the moment of inertia and bond length of the molecule.
(

) Give the Lewis structure for CO2. And include any possible resonance structures. Predict the
hybridization at the carbon.
(b) Identify and sketch the atomic orbitals involved in the π system for CO2 and the number of electrons
involved in π bonding.
(c) Sketch a picture of the π bonding molecular orbitals in your diagram.
(d) Suggest how this may explain why C=O is stronger in CO2 (802 kJmol-1
) than in other molecules such as
acetone (744 kJmol-1
)

The concentration of OH- in a solution of dishwasher detergent is 0.0052M.
What is the concentration of H3O+ in the detergent?

A saturated solution of silver benzoate AgOCOC6H5 has a pH of 8.67. The Ka for benzoic acid is 6.5x10-5. What is the Ksp for silver benzoate based on this data?

Although the 4s orbitals are occupied before 3d orbitals, yet we cannot say that they
are always more stable. Explain with suitable examples.

Describe how you would prepare a 2.00 L of 0.100 M KrCrO4 from 1.75 M K2CrO4 stock solution

How cathode ray cause reducing effect explain with an example ?

Write the reactions for the following: (5) i) Reaction showing acidic behaviour of sulphur dioxide ii) Reaction depicting the sulphonation by H2SO4 iii) Reactions of lead chambers during the manufacture of H2SO4 by Lead Chamber process iv) Reaction distinguishing between peroxomonosulphuric acid and peroxodisulphuric acid v) Reduction reaction of H2O2 with chlorine

a) In carbonate ion, all the three CO bonds have identical bond length. Explain.

3. a) Explain the reason for the variation of the first ionization energies of the third period  elements. (4) b) Calculate the lattice energy (in Units kJ mol1 ) for ZnO crystal using Eq. 3.4 based on  electrostatic model and using a Born-Haber cycle. Compare the two answers and comment  on any difference. Useful data: Medelung constant (A) = 1.6411 Born Constant (n) = 8 Internuclear distance (a) = 199 pm Zn(s) + ½ O2(g)  ZnO(s) Hf =  350.5 kJ mol1 Zn(s)  Zn(g) HS = 130.4 kJ mol1 Zn(g)  Zn+ (g) I(Zn) = 906.3 kJ mol1 Zn+ (s)  Zn2+(g) I(Zn+ ) = 1733 kJ mol1 ½ O2(g)  O(g) ½Hd = 248.5 kJ mol1 O(g)  O  (g) EA(O) = 141 kJ mol1 O - (g)  O 2 (g) EA(O ) = 780 kJ mol1