Nalanda Open University
Annual Examination 2016
B.Sc. (Honours), Part-II
Paper Chemistry (Subsidiary)
Time: 3.00 Hrs. Full Marks: 80
Answer any Five questions. All questions carry equal marks.
1. Choose correct answer from the following statements:-
Which of the following has maximum number of unpaired electrons:
Zn Cu Mn Ni
The most abundant hydrocarbon pollutant is:
CH4 C2H6 C3H8 C4H10
whinch of the following is not involved in formation of photo chemical smog:
O3 CxHy NO SO2
Aromatic compounds present as particulates are:
Benzene Toluene Nitrobenzene Polycyclic
Which of following compounds is exhibits colour:
Cacl2 AlCl3 Kcl FeCl3
Oxidation number of central metal ion in the is
2 Zero
Pyrolusite is the ore of:
Mn Cr Co Fe
(viii) Which of the following is not green house gas:
CO2 Ccl2F2 CH4 O2
2. State the salient points of Valence Bond theory. What are its defect?
3. Explain:
SiC is as hard as diamond.
Ccl4 is not hydrolysed while SiCl4 get hydrolysed.
CO2 is acidic while Sio2 is amphoteric.
C-H bond essentially not polar.
4. What do you know about Caro's and Maxshall's acid? Give their prepration and
perpertis.
5. Discuss the position of halogen in the periodic table. What are reasons in late isolation
of fluorine? Give the perpertics and uses of fluorine.
6. Define the following terms:
Double salt Ligand Co-ordination number
Differentiate between double salt and co-ordination compounds with examples.
7. What are sources of soil pollution? How can soil pollution be controlled?
8. What are the ores of cobalt? How Cobalt in pure state is obtained from its ore? Describe
its oxidation states.
9. Describe the principle involved in the derterminatiion of Nickel ion in the solution
gravimetrically.
10. Write short notes on any two of the following:
Zeocites Fullerenes
Alloptropy Optical isomerism