BGYCT-133 · December 2022 · English
IGNOU BGYCT-133 December 2022 Previous Year Question Paper
CRYSTALLOGRAPHY, MINERALOGY AND ECONOMIC GEOLOGY
Structured previous year question paper for BGYCT-133, December 2022 session.
Max marks: 50 · Questions: 4
Verified: 10 Aug 2026
BACHELOR OF SCIENCE (GENERAL)
(BSCG)
Term-End Examination
December, 2022
BG YCT-133 :CRYSTALLOGRAPHY,
M NERALOGY AND ECONOME GEOLOGY
Time : 2 Hours Maximum Marks : 50
Note : All questions are compulsory. Marks allotted
for each question are indicated against it.
Draw well-labelled diagrams, wherever
necessary.
Q1.Briefly answer any five questions of the following : 5x2=10
(a) What are ore deposits ?
(b) Define prism.
(c) What is crystal parameter ?
(d) Define pleochroic haloes.
(e) How will you distinguish between non- opaque and opaque minerals under the polarising microscope ?
(f) Differentiate between idiochromatic and allochromatic minerals.
(g) Draw crystal structure of nesosilicate.
(h) What is Carlsbad twinning ? (@) Give two diagnostic physical properties of orthoclase. G) Differentiate between cleavage and parting.
Q2.Write short notes on any four of the following : 4x5=20
(a) Optical properties of augite
(b) Clarke and Clarke of concentration
(c) Concordant ore bodies
(d) Formation of oil pool
(e) Building materials
(f) Chief ores of iron
(g) Symmetry elements and forms of galena
(h) Gemstones
Q3.Answer any one of the following questions: 10
(a) Give a detailed account of usage of minerals in different industries.
(b) Describe different habits of individual crystals and crystal aggregates found in the minerals with the help of neat well- labelled diagrams. Give examples.
Q4.(a) Discuss in detail the Indian occurrences of Gondwana coal. Mark the locations on the map of India. 5
(b) Explain hydrothermal processes of ore formation. 5
(a) Discuss origin, mode of occurrence and uses of mica minerals. 5
(b) Explain crystallographic axes, symmetry elements and forms of normal class of orthorhombic system. 5 [51 BGYCT-133 [6] BG YCT-133 [7] BG