All Free Agriculture MCQs with Answers

• A. Spectrophotometer
• B. Boiling
• C. X-ray diffraction
• D. Breaking

Explanation: Kaolinite has a characteristic crystal structure and basal spacing that can be identified through X-ray diffraction.

• A. Surface horizon
• B. C-horizon
• C. U-horizon
• D. B-horizon

Explanation: Mollic refers to a dark, organic matter-rich surface horizon or epipedon with high base status and good structure.

• A. Climate
• B. Parent material
• C. Organisms
• D. Temperature

Explanation: Parent material is a passive weathering factor because it provides the mineral substrate but does not actively drive weathering.

• A. Pyruive acid
• B. Carbon dioxide
• C. 2-ketoghconic acid
• D. Phospheric acid

Explanation: Microorganisms may produce 2-ketogluconic acid, an organic acid that chelates calcium and helps dissolve mineral compounds.

• A. Water
• B. Petrol
• C. Soil
• D. Gas

Explanation: Pneumatic potential is associated with the pressure or movement of air and other gases in soil pores.

• A. Granulation
• B. Tilth
• C. Tillage
• D. All the above

Explanation: Tilth is the physical condition of soil in relation to plant growth, including looseness, aggregation, aeration and ease of root…

• A. Lysimeter
• B. Thermometer
• C. Hydrometer
• D. All the above

Explanation: A hydrometer measures the density of soil suspension as particles settle at different rates, allowing sand, silt and clay proportions to…

• A. Clay
• B. Silt
• C. Sand
• D. Gravel

Explanation: Soil particles larger than 2 mm are classified as coarse fragments, commonly called gravel.

• A. Pedoturbation
• B. Lessivage
• C. Leaching
• D. Enrichment

Explanation: Pedoturbation is the mixing or disturbance of soil horizons by soil organisms such as earthworms, roots and burrowing animals.

• A. Adhesion
• B. Vander wall
• C. Cohesion
• D. All the aboveSoil

Explanation: Cohesion is the attraction between molecules or particles of the same substance.

• A. Purr ice
• B. Mafic
• C. Felsic
• D. Scoria

Explanation: Scoria is a dark, vesicular volcanic rock with many relatively large bubble-like holes formed by escaping gas.

• A. 2-10 m
• B. Few m 10 m
• C. Few cm 10 cm
• D. 10-12 cm

Explanation: Dikes are narrow, sheet-like igneous intrusions that commonly have thicknesses of roughly 2 to 10 metres in basic geology descriptions.

• A. Course-grained like
• B. Fine grained
• C. Large-Glassy
• D. Phenocryst

Explanation: Aphanitic rocks cool rapidly at or near the surface, leaving too little time for large crystals to form, so their texture is fine-grained.

• A. fe
• B. Quartz
• C. Buiotitic
• D. Quartz & Feldspars

Explanation: Felsic rocks are rich in silica and commonly contain abundant quartz and feldspar, giving them a relatively light colour.

• A. Intrusive igneous
• B. Metamorphic
• C. Sedimentary
• D. Extrusive igneous rock

Explanation: Plutonic rocks crystallize slowly from magma deep underground, allowing large crystals to develop, so they are also called intrusive…

• A. 100
• B. 60
• C. 30
• D. None of the above

Explanation: Standard Pakistan geography references commonly cite about 60 different mineral deposits or mineral resources in the country.

• A. Igneous
• B. Apatite
• C. Metamorphic
• D. None of the above

Explanation: Apatite is a major phosphate mineral and an important natural source of phosphorus.

• A. Stone
• B. Name of mountain
• C. Metamorphic rock
• D. None of the above

Explanation: Schist is a foliated metamorphic rock whose minerals are arranged in visible layers or bands under heat and pressure.

• A. Both a & b
• B. Sedimentary rocks
• C. Igneous rocks
• D. Cleavage

Explanation: Metamorphic rocks develop when pre-existing igneous or sedimentary rocks are changed by heat, pressure, or chemically active fluids…

• A. 0.625 mm
• B. Both b & c
• C. 0.0625 mm
• D. 0.004 mm

Explanation: Silt-sized particles are commonly placed between about 0.004 and 0.0625 mm in geological classifications, so both listed limits apply.