Master of Science I (Applied Geology)Examination: Oct Nov 2016
Semester I (Old CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SE
36
Wednesday
16/11/2016
10.30 AM
to
01.00 PM
Mineralogy and Optics
C
I
Instructions: Answer any five questions.
All questions carry equal marks.
Q.1 is compulsory.
Attempt any two from Q. 3 4
Attempt any two from Q. 6 7
Total Marks:70
Q.1 Choose the correct answer. 14
Cleavage is a property.
Non-directional and non-diagnostic
Directional and diagnostic
Non-directional and diagnostic
Directional and non diagnostic
Ring silicate structures are characteristic of minerals crystallizing in
Hexagonal system
Hexagonal and trigonal system
Hexagonal tetragonal and orthorhombic system
Hexagonal, orthorhombic and monoclinic system
Nepheline is a group of mineral
Feldspar feldspathoid
Olivine quartz
Which one among the following is a isometric mineral.
Feldspar Olivine
garnet muscovite
The main difference between graphite and diamond is
Composition hardness
density crystal structure
The purest and the most transparent from of quartz is
milky quartz rose quartz
rock crystal aventurine
The end member of an olivine series is
forsterite fayalite
orthoferrosilite augite
The refractive index of the Canada balsam is
1.50 1.54
1.486 1.65
Which of the following is used for the identification of polished sections of
metallic ores?
Compound microscope Polarizing microscope
reflecting microscope binocular microscope
10) The 'Melatope' of an interference figure coincides with
The point of emergence of the optic axis
Direction perpendicular to the optic axis
Direction 45 to the optic axis
None of the above
11) The purple colour of amethyst is due to the presence of
titanium manganese
iron chromium
12) Hardness of minerals increases with a/an
increase in valency
increase in bond strength
increase in the density of packing of atoms
all of the above
13) On Moh's scale of harness possess hardness 4.
calcite apatite
fluorite feldspar
14) When anions and cations of similar size and in same numbers crystallizes in
similar type of structure the phenomenon is known as
isomorphism polymorphism
diadochy eutectic crystallization
Q.2 Discuss structure, chemistry, optical properties and paragenesis of Alkali feldspar
group.
14
Q.3 Write a full note on interference figure of biaxial and uniaxial mineral. 14
Q.4 Write in detail different types of silicate structure. 14
Q.5 Write short notes on the following 14
Polysynthetic twining
Optical physical properties of olivine mineral
Q.6 Explain briefly the following: 14
Pleochroism
Concept of light under microscope
Q.7 Attempt the following: 14
Polymorphism Isomorphism
Optical properties of garnet