Solapur University
B.Sc. – II (Semester – III) (New) Examination, 2015
GEOLOGY (Paper – V)
Optics and Mineralogy
Day and Date : Thursday, 28-5-2015 Max. Marks : 50
Time : 3.00 p.m. to 5.00 p.m.
Instructions : 1) All questions are compulsory.
2) Draw neat diagrams wherever necessary.
3) Figures to the right indicate full marks.
1. Fill in the blanks with correct answer from the given option : 10
1) A group of silicate minerals which contain discrete [SiO4] tetrahedra is called as ______________
a) Nesosilicate b) Sorosilicate c) Inosilicate d) Cyclosilicate
2) ______________ of a mineral is directly related to the refractive index.
a) Cleavage b) Relief c) Form d) Alteration
3) ______________ substance transmit light with unequal velocity in all direction.
a) Isotropic b) Anisotropic
c) Isotropic and Anisopopic d) None of these
4) The tremolite mineral is found only in ______________ rock.
a) Igneous b) Sedimentary c) Metamorphic d) None of these
5) Nephelene mineral belonging to ______________ group.
a) Chlorite b) Garnet c) Clay d) Feldsphathoid
6) The composition of lusite is ______________
a) KAI Si2O6 b) NaAl Si2O6 c) CaAlSi2O6 d) CaNa Si2O6
7) The hardness of hornblende is ______________
a) 2 to 3 b) 5 to 6 c) 7 to 8 d) 8 to 9
8) The inosilicate is also called as ______________
a) Ringe silicate b) Sheet silicate c) Orthosilicate d) Chain silicate
9) All uniaxial mineral posses ______________ extension.
a) Straight b) Oblique
c) Straight and oblique d) None of these
10) The mineral ______________ is in pyroyene group.
a) Tremolite b) Kyanite c) Chlorite d) Diopside
2. Answer any five of the following : 10
1) Colour
2) Optical properties of biotite
3) Alteration of mineral
4) Twinning
5) Cleavage
6) Anisotropism.
3. A) Answer any two of the following : 6
1) Mode of occurrence of chlorite minerals.
2) Physical properties of garnet.
3) Polymorphism.
B) Explain with suitable diagram, the behaviour of light under petrological microscope. 4
4. Answer any two of the following : 10
1) Structure and physical properties of pyroxene group of minerals.
2) Describe phyllosilicate and tectosilicate.
3) Describe crystalline and cryptocrystalline silica.
5. Answer any two of the following : 10
1) Describe chemistry and optical properties of feldspar group.
2) Describe optical properties under PPL (Plane Polarised Light).
3) Explain the physical properties and occurrence of feldspathoid group.
B.Sc. – II (Semester – III) (New) Examination, 2015
GEOLOGY (Paper – V)
Optics and Mineralogy
Day and Date : Thursday, 28-5-2015 Max. Marks : 50
Time : 3.00 p.m. to 5.00 p.m.
Instructions : 1) All questions are compulsory.
2) Draw neat diagrams wherever necessary.
3) Figures to the right indicate full marks.
1. Fill in the blanks with correct answer from the given option : 10
1) A group of silicate minerals which contain discrete [SiO4] tetrahedra is called as ______________
a) Nesosilicate b) Sorosilicate c) Inosilicate d) Cyclosilicate
2) ______________ of a mineral is directly related to the refractive index.
a) Cleavage b) Relief c) Form d) Alteration
3) ______________ substance transmit light with unequal velocity in all direction.
a) Isotropic b) Anisotropic
c) Isotropic and Anisopopic d) None of these
4) The tremolite mineral is found only in ______________ rock.
a) Igneous b) Sedimentary c) Metamorphic d) None of these
5) Nephelene mineral belonging to ______________ group.
a) Chlorite b) Garnet c) Clay d) Feldsphathoid
6) The composition of lusite is ______________
a) KAI Si2O6 b) NaAl Si2O6 c) CaAlSi2O6 d) CaNa Si2O6
7) The hardness of hornblende is ______________
a) 2 to 3 b) 5 to 6 c) 7 to 8 d) 8 to 9
8) The inosilicate is also called as ______________
a) Ringe silicate b) Sheet silicate c) Orthosilicate d) Chain silicate
9) All uniaxial mineral posses ______________ extension.
a) Straight b) Oblique
c) Straight and oblique d) None of these
10) The mineral ______________ is in pyroyene group.
a) Tremolite b) Kyanite c) Chlorite d) Diopside
2. Answer any five of the following : 10
1) Colour
2) Optical properties of biotite
3) Alteration of mineral
4) Twinning
5) Cleavage
6) Anisotropism.
3. A) Answer any two of the following : 6
1) Mode of occurrence of chlorite minerals.
2) Physical properties of garnet.
3) Polymorphism.
B) Explain with suitable diagram, the behaviour of light under petrological microscope. 4
4. Answer any two of the following : 10
1) Structure and physical properties of pyroxene group of minerals.
2) Describe phyllosilicate and tectosilicate.
3) Describe crystalline and cryptocrystalline silica.
5. Answer any two of the following : 10
1) Describe chemistry and optical properties of feldspar group.
2) Describe optical properties under PPL (Plane Polarised Light).
3) Explain the physical properties and occurrence of feldspathoid group.
0 comments:
Pen down your valuable important comments below