B.Sc. II (Semester – IV) ,Solapur University Question Paper,GEOCHEMISTRY Principles of Geochemistry (Paper – III),2014 Question Paper

Solapur University Question Paper
B.Sc. II (Semester – IV) Examination, 2014
GEOCHEMISTRY
Principles of Geochemistry (Paper – III)
Day and Date : Wednesday, 30-4-2014 Max. Marks : 50
Time : 3.00 p.m. to 5.00 p.m.
Instructions: 1) All questions are compulsory.
2) Figures to the right indicate full marks.
3) Draw neat diagrams wherever necessary.
1. Select the most correct alternative from each of the following : 10
1) Chemical equilibrium is _______ in nature.
a) static b) dynamic c) elastic d) none of these
2) Na2CO3 is _______ in nature.
a) basic b) acidic c) neutral d) hypotonic
3) Organic acid contains ________ group.
a) ––COOH b) >c = 0 c) ––OH d) ––NH2
4) Silica is a _________ clay mineral.
a) positive b) neutral c) negative d) zero
5) The rate constant “K” for the reaction
N2(g) + 3H2(g) 2NH3(g) is ___________
a) [N ][3H ]
[2NH ] K
2 2
3 = b) [N ][H ]
[NH ] K
2 2
3 =
c) 3
2 2
2
3
[N ][H ]
[NH ] K = d) None of these
6) The formation of petroleum is from ________ rocks.
a) Sedimentary b) Igneous c) Metamorphic d) Besalt
7) Brownian movement is _________ property of colloidal solution.
a) mechanical b) electrical c) optical d) chemical
Seat
No.
SLR-C – 95 
8) Acid rock contains high percentage of
a) SiO2 b) MgO c) CaO d) FeO
9) The formula of Olivine is
a) [SiO4]
–4 b) [SiO4]
–7 c) [SiO4]
–3 d) [Si2O7]
–6
10) The name of CaSO4 is ________.
a) gypsum b) mica c) quartz d) beryl
2. Answer any five of the following : 10
i) Define : emulsion. Give one example.
ii) Write the structure of
a) Cyclohexane
b) Glycine
iii) Give the geological uses for acids and bases (any two).
iv) Discuss the effect of temperature on the reaction between CO2 and H2O.
v) Discuss : Bredig’s Arc method for the preparation of gold sol.
vi) Define hydrolysis. Write hydrolysis reaction only for Na2CO3 hydrolysis.
3. A) Answer any two of the following : 6
i) Explain : clay minerals as colloids
ii) Discuss the conventions of chemical equilibrium
iii) Draw the structure of :
a) Hemimorphite
b) Beryl
B) Distinguish between true solution and colloidal solution. 4
4. Answer any two of the following : 10
i) Explain : The origin of coal
ii) State and explain Lechatalier’s principle
iii) Write a short note on “Occurrence of carbon in rock”.
5. Answer any two of the following : 10
i) Explain : origin of petroleum
ii) Discuss : Tyndall effect
iii) Explain the stability of colloidal solution.
————————

Share This