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100+ Free Karnataka II PUC Geology (KSEAB) Practice Questions

Karnataka School Examination and Assessment Board (KSEAB) II PUC Class 12 Geology (Subject Code 37) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: Karnataka II PUC Geology (KSEAB) Exam

Code 37

Official II PUC Geology subject code

KSEAB / DPUE II PUC subject list and blueprints 2025–26

80 marks

Public theory paper maximum marks (mixed format)

KSEAB II PUC Geology scheme of evaluation (e.g., March 2025)

3 h 15 m

Typical II PUC exam duration including reading time

KSEAB II PUC exam logistics / date sheet reporting

~30% / ~33%

Commonly reported per-subject minimum and overall aggregate pass range

KSEAB pass criteria reporting (confirm current circular)

80+20 pattern

Commonly described theory + internal split (confirm year notice)

KSEAB II PUC assessment reporting

Mixed paper

Official format is objective + subjective with diagrams, not pure MCQ

KSEAB II PUC Geology Parts A–D evaluation scheme

English MCQ adaptation

This free local bank is not the official mixed paper format

OpenExamPrep practice policy

KSEAB II PUC Geology (code 37) is a Class 12 board subject with a mixed objective + subjective 80-mark theory paper (~3 h 15 min) plus ~20 internal as commonly described. Pass is commonly ~30% per subject and ~33% aggregate as notified. Fees are paid through colleges. This free 2026 bank is an English MCQ study adaptation — not an official paper simulation.

Sample Karnataka II PUC Geology (KSEAB) Practice Questions

Try these sample questions to test your Karnataka II PUC Geology (KSEAB) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1During the rock cycle, how can a sedimentary rock become a metamorphic rock?
A.By heat and pressure (and often fluids) without complete melting
B.By melting completely into magma and then extruding as lava
C.By simple mechanical crushing at the surface with no temperature change
D.By dissolving fully in seawater and reprecipitating as salt
Explanation: In the rock cycle, sedimentary rock becomes metamorphic when it is buried and subjected to elevated pressure, temperature, and commonly chemically active fluids, causing recrystallization and new mineral assemblages without wholesale melting.
2What does petrology primarily study?
A.Only the classification of living fossils in sedimentary basins
B.The origin, composition, classification, and occurrence of rocks
C.Only the measurement of earthquake magnitude scales
D.Only the chemistry of seawater and atmospheric gases
Explanation: Petrology is the branch of geology concerned with rocks: their formation (petrogenesis), mineral composition, textures and structures, classification, and field occurrence.
3Rocks that form by solidification of magma or lava are called:
A.Sedimentary (secondary) rocks only
B.Metamorphic rocks only
C.Igneous (primary) rocks
D.Organic soils
Explanation: Igneous rocks crystallize from molten rock (magma underground or lava at the surface). They are often called primary rocks because they form directly from melt rather than from reworked pre-existing rock fragments.
4Secondary rocks in the II PUC geology sense most nearly means:
A.Only volcanic glass quenched at the surface
B.Only high-grade granulites of the deep crust
C.Only man-made concrete and brick
D.Sedimentary rocks formed from weathered products of pre-existing rocks
Explanation: Sedimentary rocks are called secondary rocks because their materials are derived from breakdown and reworking of earlier rocks (and biogenic/chemical sources), then deposited and lithified.
5Which process is required to turn loose sediment into solid sedimentary rock?
A.Lithification (compaction and cementation / diagenesis)
B.Complete melting of the sediment pile
C.Only wind abrasion without burial
D.Only sudden freezing of surface water
Explanation: Loose sediment becomes sedimentary rock through lithification: burial-driven compaction, cementation by minerals precipitated from pore fluids, and broader diagenetic changes.
6In the rock cycle, which path correctly produces an igneous rock from a metamorphic rock?
A.Only gentle weathering at the surface without melting
B.Melting of the metamorphic rock followed by cooling and crystallization of magma
C.Only cementation of metamorphic fragments without heat
D.Only alignment of micas under directed stress without melting
Explanation: Any rock type can melt. When a metamorphic rock melts and the resulting magma later cools and crystallizes, the new rock is igneous.
7Texture in igneous petrology mainly refers to:
A.Only the large mountain-scale shape of a batholith
B.Only the color of a rock hand specimen
C.Small-scale features of grain size, shape, and mutual relationships among minerals (and glass)
D.Only the absolute age determined by radiometric dating
Explanation: Texture describes the crystallinity, grain size (granularity), grain shape, and geometric relations among minerals and glass as seen in hand specimen or under the microscope.
8Which statement best contrasts rock structure with rock texture?
A.Structure always requires a microscope; texture never does
B.Structure applies only to fossils; texture applies only to water
C.Structure and texture are exact synonyms in all textbooks
D.Structure is larger-scale fabric or form; texture is smaller-scale grain relations
Explanation: Structures (vesicles, pillows, bedding, folds at outcrop scale) are larger features of rock bodies, while textures concern grain-scale arrangements. Both are used in description and classification.
9Which of the following is a hypabyssal (shallow intrusive) rock commonly cited in II PUC papers?
A.Dolerite (diabase)
B.Obsidian
C.Pumice
D.Shale
Explanation: Dolerite (diabase) is a medium-grained mafic rock that typically forms shallow intrusive bodies such as dykes and sills — classic hypabyssal setting between plutonic and volcanic extremes.
10Sills are best described as:
A.Discordant, wall-like bodies that cut across bedding
B.Thin, tabular concordant intrusive bodies roughly parallel to bedding
C.Pipe-like vertical feeders only at volcano summits
D.Loose piles of volcanic ash without intrusion
Explanation: Sills are sheet-like intrusions that are concordant — they inject roughly parallel to layering of the host rocks. Dykes, by contrast, are typically discordant.

About the Karnataka II PUC Geology (KSEAB) Practice Questions

Verified exam format metadata for Karnataka School Examination and Assessment Board (KSEAB) II PUC Class 12 Geology (Subject Code 37) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.