PPSC 5 YEARS PAST PAPERS SUBJECT WISE (SOLVED WITH DETAILS)
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
جب زرعی طلب کم ہوتی ہے تو مجموعی پیداوار پر عموماً کیا اثر پڑتا ہے؟
- Increases
- Decreases
- Remains the same
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- When demand for agricultural products decreases, farmers generally have less incentive to produce the same quantity.
- Lower demand can reduce market prices and farmers’ expected income, leading them to reduce production over time.
- The response is not always immediate because agricultural production also depends on weather, input costs, government policies, and existing stocks.
Last verified on 16-10-2026
سخت زمین میں استعمال ہونے والے بڑے دندانے والے زرعی آلات کس سے متعلق ہیں؟
- Subsoiler
- Chisel plough
- Disc harrow
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- A chisel plough is a tillage implement with strong.
- It is widely spaced tines used to loosen hard soil and break compacted layers while leaving much of the soil surface relatively undisturbed.
- Its large, rigid shanks can penetrate firm soil and improve water infiltration and root growth.
Last verified on 16-10-2026
درجۂ حرارت بڑھنے سے سطحی تناؤ پر کیا اثر پڑتا ہے؟
- Decreases
- Increases
- First increases then decreases
- None of these
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Explanation
- Surface tension decreases as temperature increases.
- Higher temperature increases the kinetic energy of liquid molecules, weakening the effect of intermolecular cohesive forces at the surface.
- Surface tension becomes nearly zero at the critical temperature, where the distinction between liquid and gas disappears.
- Water has a surface tension of approximately 72.8 mN/m at 20°C.
Last verified on 16-10-2026
گندم کی لوز سمٹ بیماری کس ذریعے سے پھیلتی ہے؟
- Water
- Seed
- Soil
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Loose smut of wheat is a seed-borne fungal disease caused by Ustilago tritici.
- The fungus infects the developing wheat embryo, and the infected seed may appear healthy externally.
- When infected seeds germinate, the fungus grows with the plant and eventually replaces the grain in the ear with black, powdery spores.
Last verified on 16-10-2026
زرعی جنگلات پر مبنی صنعت کون سی ہے؟
- Textile
- Furniture
- Construction
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Agroforestry is a land-use system that combines trees or shrubs with agricultural crops and/or livestock.
- The furniture industry uses wood obtained from trees grown in forests and agroforestry systems.
- Trees grown on farms can provide timber, reduce pressure on natural forests, and generate additional income for farmers.
Last verified on 16-10-2026
ڈینیٹریفیکیشن کس قسم کا عمل ہے؟
- Hydrolysis
- Oxidation
- Reduction
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Denitrification is a biological reduction process in which microorganisms convert nitrate into gaseous nitrogen compounds, mainly nitrogen gas.
- It usually occurs under anaerobic conditions, when oxygen is limited in the soil.
- This process returns nitrogen to the atmosphere and reduces the amount of nitrogen available to plants.
Last verified on 16-10-2026
زمین کی سوڈیسٹی کا علاج کس طریقے سے کیا جاتا ہے؟
- Gypsum
- Leaching
- Both (Gypsum followed by Leaching)
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Sodicity occurs when excessive exchangeable sodium accumulates in the soil.
- It damaging soil structure and reducing water infiltration.
- Gypsum supplies calcium, which replaces sodium on soil exchange sites.
- Leaching then uses suitable-quality water to wash the displaced sodium salts down through the soil profile.
- Adequate drainage is essential.
Last verified on 16-10-2026
بلائنڈ ہوئنگ کس فصل میں کی جاتی ہے؟
- Sugarcane
- Cotton
- Rice
- None of these
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Explanation
- Blind hoeing is the shallow cultivation of soil before the crop seedlings emerge, mainly to destroy young weeds.
- In cotton, it is performed after sowing but before the cotton seedlings emerge, helping control weeds without damaging the crop.
- It requires careful timing and shallow operation to avoid disturbing germinating seeds.
Last verified on 16-10-2026
- Pear
- Plum
- Apricot
- None of these
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Explanation
- Prunus armeniaca is the scientific name of apricot.
- Apricot is a stone fruit belonging to the family Rosaceae.
- It is a deciduous fruit tree.
- It is commonly cultivated in temperate and cool regions.
Additional information:
- Pear: Pyrus communis
- Plum: Prunus domestica
- Peach: Prunus persica
Last verified on 16-10-2026
ادرک پودے کا کون سا حصہ ہے؟
- Leaf
- Stem (Rhizome)
- Root
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Ginger is an underground modified stem called a rhizome.It stores nutrients.It helps in vegetative propagation.Last verified on 27-07-2026