M.Sc. (Semester (CBCS) Examination Nov/Dec-2018
Applied Geology
MINEROLOGY AND OPTICS
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Q.1 Rewrite the sentences by choosing correct answer from given alternatives: 14
Minerals which show isotropic nature are crystallized in system.
Cubic Trigonal
Orthorhombic Triclinic
Find odd one out
Colur Luster
Hardness Quartz
Admentine is the luster shown by
Topaz Diamond
Calcite Olivine
Feldspar group of minerals are classed as
Nesosilicates Sorosilicates
Tectosilicates Phyllosilicates
Becke line method is employed for determination of
2v R.I.
Extinction Pleochroism
Aluminosilicate group of minerals are having chemical formula
AI2SiO5 AI3SiO5
AISiO5 AI2SiO6
Among the following minerals, which is the common mica mineral
Kaolinite Montmorillonite
Bentonite Muscovite
Which of the following is biaxial mineral
Muscovite Quartz
Rutile Beryl
Wollastonite has a chemical formula
CaSiO3 MgSiO3
FeSiO3 MnSiO3
10) Alkali feldspar has a
Straight Oblique
Both of the above None of the above
11) Which of the following amphibole mineral
Actinolite Fayalite
Bronzite Hypersthene
12) Diamond primarily occurs in
Basalt Kimberlite
Pegmatite Granites
13) The hydrous alumino silicates are also called as
Clays Epidotes
Zeolites Gemstones
14) Which of the following is not a isomorphic series?
Albite-Anorthite Fayalite-Forsterite
Enstatite Ferrosilite Kyanite Silimanite
Q.2 Answer the following any four:-
1. What is plane polarized light?
2. Define perthites and antiperthites
3. What are base metals?
4. What are speneloids?
5. What is birefringence?
08
Write notes on (Any
1. Occurrences of Epidotes
2. Quartz wedge
3. Nesosilicates
06
Q.3 Answer the following Any
1. Describe high pressure polymorphs of olivines.
2. Describe in brief physical properties of auminosilicates.
3. Write down the difference between orthopyroxenes and clinopyroxenes.
08
Answer the following any one
1. Write down chemistry occurrences of Alkali feldspar group of minerals.
2. Describe in brief zeolite group of minerals.
06
Q.4 Answer the following Any
1. Describe the concept of light under microscope.
2. How to determine the optic sign of uniaxial minerals.
3. Chemistry and structure of Garnet group of minerals.
10
Answer the following any one
1. Physical and optical properties of Biotite Muscovite minerals.
2. Describe in brief on gemstones.
04
Q.5 Answer the following (any two) 14
Describe in brief the clay group of minerals.
Define twinning. Write a short note on twinning in feldspars.
Describe in brief the Amphibole group of minerals.