कृषि, पशु र वन विज्ञान B.Sc. Forestry प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Forestry प्रवेश
B.Sc. Forestry Entrance · Agriculture, Veterinary & Forestry Entrance
२,४९३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कृषि, पशु र वन विज्ञान प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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Powdered limestone reacts faster with dilute HCl than a single lump of the same mass because:
सही उत्तर: घ) the powder has a larger surface area
Greater surface area exposes more particles to the acid, increasing the number of collisions per second.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Food kept in a refrigerator spoils more slowly mainly because:
सही उत्तर: ग) the rate of chemical and microbial reactions decreases at low temperature
Lowering the temperature reduces the number of effective collisions and slows enzyme and microbial activity.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For a reaction A → products, doubling the concentration of A makes the rate four times. The order of the reaction with respect to A is:
सही उत्तर: ग) 2
rate ∝ [A]ⁿ; 2ⁿ = 4 gives n = 2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Enzymes act in living organisms as:
सही उत्तर: ख) biological catalysts
Enzymes are mostly proteins that speed up biochemical reactions without being consumed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Photosynthesis is an example of a reaction that is:
सही उत्तर: घ) endothermic, absorbing light energy
6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂; energy is absorbed and stored in glucose.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Detergents work better than soaps in hard water because:
सही उत्तर: ग) their calcium and magnesium salts are soluble
Detergents (e.g. sodium alkylbenzene sulphonates) do not form insoluble precipitates with Ca²⁺ and Mg²⁺.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Hard water does not form lather easily with soap because:
सही उत्तर: घ) calcium and magnesium ions form an insoluble scum with soap
Ca²⁺ and Mg²⁺ ions react with soap to form insoluble calcium and magnesium salts of fatty acids.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Alum is added to muddy water to make it clear because it:
सही उत्तर: क) coagulates the suspended clay particles so they settle
The Al³⁺ ions neutralise the charge on the negatively charged colloidal particles, which then clump together and settle.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Plants may wilt ('fertiliser burn') when too much fertiliser is applied close to the roots because:
सही उत्तर: क) the soil solution becomes more concentrated than the cell sap, so water moves out of the roots by exosmosis
A concentrated (hypertonic) soil solution draws water out of root cells.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Plant roots absorb water from the soil mainly by:
सही उत्तर: घ) osmosis
Cell sap in root hairs is more concentrated than soil water, so water moves in through the semi-permeable membrane by osmosis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
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