AHSEC| CLASS 12| GEOLOGY| QUESTION PAPER - 2022| H.S. 2ND YEAR
2022
GEOLOGY
(Theory)
Full Marks: 70
Pass Marks: 21
Time: Three hours
The figures in the margin indicate
full marks for the questions.
1. Answer any eight of the following selecting the correct option given below: 1x8=8
(a) ________is
an extrusive rock.
(i) Basalt
(ii) Dolerite
(iii) Gabbro
(b) Very coarse-grained
sedimentary rocks are called as _______.
(i) Rudaceous
rocks
(ii) Arenaceous
rocks
(iii)
Argillaceous rocks
(c) _____is a
sedimentary rock.
(i) Limestone
(ii) Granite
(iii) Quartzite
(d) ________is
metamorphic rock.
(i) Sandstone
(ii) Basalt
(iii) Schist
(e) When in an
igneous rock SiO2 is more than 66%, it is called _______.
(i) Basic rock
(ii) Acid rock
(iii)
Intermediate rocks
(f) Dupitila
group belongs to ________.
(i) Tertiary period
(ii) Gondwana
Super Group
(iii) Quaternary
period
(g) Barail group
belongs to ________.
(i) Quaternary
period
(ii) Tertiary
period
(iii)
Precambrian
(h) Bhuban
formation belongs to _______.
(i) Surma group
(ii) Tipam group
(iii) Barail
group
(i) Dihing group
belongs to _______.
(i) Tertiary
period
(ii) Quaternary
period
(iii) Gondwana
Super Group
(j) Turitella is
a _________.
(i) Gastropoda
(ii) Brachiopoda
(iii)
Lamellibranchia
(k) The Brachiopoda
shell has ________valve.
(i) Three
(ii) One
(iii) Two
(l) ______is an
ore of Manganese.
(i) Hematite
(ii) Chalcopyrite
(iii)
Psilomelane
(m) _________is
an ore of iron.
(i) Hematite
(ii)
Chalcopyrite
(iii) Rhodonite
(n) _______is an
ore of copper.
(i) Malachite
(ii) Hematite
(iii) Rhodonite
(o) Coal is a
________.
(i) Rock
(ii) Mineral
(iii) Crystal
(p) Porosity is
maximum in _________.
(i) Metamorphic
rock
(ii) Sedimentary
rock
(iii) Igneous
rock
2. Write on any ten of the following in two or three
sentences each: 2x10=20
(a) Intrusive
rock
(b) Volcanic
rock
(c) Ripple marks
(d) Graded
bedding
(e) Pillow
structure
(f) Gneiss
(g) Gastropod
shell
(h) Tura formation
(i) Barail Group
(j) Placer deposit
(k) Rank of coal
(l) Dam
(m) Origin of
petroleum
(n) Migration of
petroleum
(o) Water table
(p) Porosity
(q) Fossil
impression
(r) Types of
fossils
3. Write short notes on any nine of the following: 3x9=27
(a) Formation of
sedimentary rock
(b) Batholith
(c) Diagenesis
(d) Muscovite
(e) Moulds and
casts
(f) Occurrence
of Iron ore in India
(g) Shape of the
Brachiopoda shell
(h) Permeability
(i) Origin of
coal
(j) Petroleum traps
(k) Makum Coalfield
(l) Mode of preservation
of fossil
(m) Ore and
gangue
(n) Aquifers
(o) Index fossil
(p) Hydrological
cycle
(q) Magmatic
differentiation
4. Describe any three of the following: 5x3=15
(a) Geological
causes of flood.
(b) Preventive
measures of flood.
(c) Coalfields
of North-East India.
(d) Distribution
of petroleum in NE India.
(e) Factors of
selecting dam site.
(f) Classification
of Gastropoda.
***
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