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100+ Free Kerala Plus Two Geology Practice Questions

Kerala DHSE Higher Secondary Plus Two Geology (Class 12) practice questions are available now; exam metadata is being verified.

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Key Facts: Kerala Plus Two Geology Exam

~2 h + cool-off

Typical duration of the Plus Two Geology theory paper under DHSE Kerala, plus cool-off as notified

Kerala DHSE Higher Secondary examination timetable practice

TE + CE + Practical

Official subject total is 100 marks combining theory, continuous evaluation, and practical where applicable; this bank is an English MCQ study adaptation only

Kerala DHSE Higher Secondary Geology assessment pattern

D+ / ~30%

Typical minimum grade band ~30% aggregate with about ~30% TE as notified for promotion — confirm the year's grading circular

DHSE Higher Secondary grading notifications

Fee via school

Examination fees are typically paid through the school under DHSE notifications (not a fixed geology-only marketplace price)

DHSE fee notification practice

DHSE Kerala

Administrator is the Directorate of Higher Secondary Education (DHSE), Kerala, with SCERT syllabus support

dhsekerala.gov.in / SCERT Kerala

100 FREE MCQs

Local practice bank size for concept drill (not the official item count)

OpenExamPrep practice bank

Free 100-question English MCQ study bank for Kerala DHSE Plus Two Geology (Class 12). Official exams use TE + CE + Practical where applicable (100 marks total), ~2 h theory + cool-off; pass typically D+/~30% aggregate with ~30% TE as notified; fee via schools as notified by DHSE. Not an official full-format simulation. Sources: dhsekerala.gov.in, beta.hseportal.kerala.gov.in, SCERT Kerala, and dmg.kerala.gov.in.

Sample Kerala Plus Two Geology Practice Questions

Try these sample questions to test your Kerala Plus Two Geology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1How many crystal systems are conventionally recognised in crystallography?
A.Thirty-two
B.Seven
C.Five
D.Twelve
Explanation: Crystals are classified into seven crystal systems (cubic/isometric, tetragonal, orthorhombic, hexagonal, trigonal/rhombohedral, monoclinic, and triclinic) based on axial lengths and interaxial angles. The thirty-two crystal classes are subdivisions of these systems based on point-group symmetry.
2Which mineral hardness standard is defined as Mohs hardness 10?
A.Topaz
B.Quartz
C.Diamond
D.Corundum
Explanation: On the Mohs scale of relative hardness, diamond is assigned hardness 10 — the hardest common natural mineral on that scale. Corundum is 9, topaz 8, and quartz 7.
3What does the streak of a mineral record?
A.The colour of the fresh crystal face under sunlight only
B.The density of the mineral relative to water
C.The angle between two crystal faces
D.The colour of its powdered form, usually on an unglazed porcelain plate
Explanation: Streak is the colour of a mineral in powdered form, typically obtained by rubbing it on an unglazed porcelain streak plate. Streak is often more diagnostic than hand-specimen colour, especially for metallic ore minerals.
4Cleavage in minerals refers to:
A.The tendency of a crystal to break along preferred planes of weak bonding
B.The random, conchoidal breaking of glass-like substances only
C.The ability of a mineral to scratch glass
D.The growth of crystals only in cubic form
Explanation: Cleavage is the preferential breaking of a crystal along planes of relatively weak interatomic bonding, producing smooth planar surfaces. Fracture describes irregular breaks (e.g., conchoidal fracture in quartz).
5Which silicate structure characterises the mineral quartz (SiO₂)?
A.Sheet (phyllosilicate) structure like micas
B.Framework (tectosilicate) of corner-sharing SiO₄ tetrahedra
C.Isolated (nesosilicate) SiO₄ tetrahedra with no sharing
D.Single-chain (inosilicate) structure only
Explanation: Quartz is a framework silicate (tectosilicate) in which every SiO₄ tetrahedron shares all four oxygen corners with neighbouring tetrahedra, giving the composition SiO₂. Nesosilicates have isolated tetrahedra; chains and sheets describe other silicate classes.
6Isomorphism in mineralogy means:
A.A mineral exists only as an amorphous glass
B.A crystal has no symmetry elements at all
C.Different minerals share the same crystal structure type and can form solid solutions
D.Two minerals have identical chemical formulas but unrelated structures
Explanation: Isomorphism refers to minerals with analogous crystal structures that can substitute ions of similar size and charge, often forming solid-solution series (e.g., olivine forsterite–fayalite). Polymorphism is the same composition in different structures.
7Which pair correctly matches a mineral with its common diagnostic physical property?
A.Quartz — perfect cubic cleavage in three directions
B.Halite — hardness of 7 on the Mohs scale
C.Graphite — vitreous lustre and hardness 7
D.Calcite — strong reaction (effervescence) with dilute HCl
Explanation: Calcite (CaCO₃) effervesces vigorously with cold dilute hydrochloric acid, a classic field test. Quartz lacks cleavage and fractures conchoidally; halite is soft (Mohs ~2.5) with cubic cleavage; graphite is soft with metallic/greasy lustre.
8Feldspar minerals are most abundant in the Earth's:
A.Continental crust
B.Outer core
C.Atmosphere
D.Hydrosphere only
Explanation: Feldspars (alkali and plagioclase) are the most abundant mineral group in the Earth's crust, especially continental crustal rocks such as granites and many metamorphic rocks. The outer core is metallic (Fe–Ni liquid), not silicate feldspar.
9In optical mineralogy under crossed polars, isotropic minerals such as garnet appear:
A.Only visible in reflected light and never in thin section
B.Extinct (dark) in all orientations
C.Brightly coloured with maximum birefringence in every orientation
D.Always length-fast with strong pleochroism
Explanation: Isotropic minerals (cubic system, or amorphous) have a single refractive index and remain extinct under crossed nicols in all stage positions. Anisotropic minerals show interference colours that change with rotation.
10Which crystal system has three axes of equal length intersecting at 90°?
A.Monoclinic
B.Triclinic
C.Isometric (cubic)
D.Hexagonal
Explanation: The isometric (cubic) system has three mutually perpendicular axes of equal length (a = b = c; α = β = γ = 90°). Hexagonal has a unique c-axis and three a-axes at 120°; monoclinic and triclinic have unequal axes and non-orthogonal angles.

About the Kerala Plus Two Geology Practice Questions

Verified exam format metadata for Kerala DHSE Higher Secondary Plus Two Geology (Class 12) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.