कृषि, पशु र वन विज्ञान B.Sc. Ag र B.V.Sc. & A.H. प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Ag र B.V.Sc. & A.H. प्रवेश
B.Sc. Ag & B.V.Sc. 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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The practice of ‘agroforestry’ – integrating trees into agricultural systems – can lead to what significant environmental benefit in Nepal?
सही उत्तर: क) Increased soil salinity
Agroforestry involves the deliberate integration of trees with crops and/or livestock. This significantly contributes to carbon sequestration, removing CO2 from the atmosphere and storing it in tree biomass and the soil – a vital practice for mitigating climate change within Nepal’s agricultural sector.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Considering Nepal's mountainous terrain and diverse agroclimatic zones, which crop is generally considered to be the most suitable for cultivation at higher altitudes (above 3000m)?
सही उत्तर: घ) Barley
Barley is a resilient cereal grain that thrives in cooler temperatures and shorter growing seasons found at higher elevations. Maize, rice, and potato are better suited to lower altitudes and warmer climates within Nepal’s diverse landscapes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following forest types dominates the subtropical moist broadleaf forests found across much of central and western Nepal?
सही उत्तर: ग) Nepalese Sal (Shorea robusta) Dominance
The Nepalese Sal tree (Shorea robusta) is the dominant species in the subtropical moist broadleaf forests, forming a significant portion of Nepal’s forest cover. The other options represent different vegetation types and geographic locations within Nepal.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What primary role do nitrogen-fixing bacteria play in improving soil fertility in legume crops such as beans and lentils grown in Nepal’s agricultural fields?
सही उत्तर: क) They convert sunlight directly into energy
Nitrogen-fixing bacteria, particularly Rhizobium, live symbiotically with legumes and convert atmospheric nitrogen gas into ammonia, a form of nitrogen that plants can use. This process significantly boosts plant growth and reduces the need for synthetic nitrogen fertilizers, which is crucial in Nepal's agricultural context.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The term ‘slash and burn agriculture’ (Jhoom) is most closely associated with which traditional farming system prevalent in parts of central Nepal?
सही उत्तर: ग) Swidden agriculture practiced by indigenous communities
‘Slash and burn’ or ‘Jhoom’ is a traditional agroforestry system where land is cleared for cultivation, then periodically abandoned to allow for natural regeneration. This matches the historical farming method used extensively in Nepal's hilly regions. The other options represent different agricultural practices not aligned with Jhoom.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following practices is MOST beneficial for soil conservation on sloping lands in Nepal's agricultural regions?
सही उत्तर: ख) Terracing and contour ploughing
Terracing and contour ploughing are specifically designed to reduce erosion by creating level platforms and minimizing slope runoff. The other options – crop rotation, deep ploughing, and monoculture – generally increase the risk of soil loss. This aligns with sustainable land management practices promoted in Nepal’s agricultural policy.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is NOT a characteristic of an acid? (a) It turns blue litmus paper red. (b) It has a pH value less than 7. (c) It reacts readily with metals to produce hydrogen gas. (d) It neutralizes bases.
सही उत्तर: घ) (d) It neutralizes bases.
Acids are defined by their properties. They react with metals to produce hydrogen (H₂), turning blue litmus paper red, have a pH < 7, and neutralize bases. Statement (c) describes the correct reaction of an acid with a metal.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of converting nitrogen gas into ammonia in the presence of a catalyst and hydrogen molecules is known as: (a) Combustion (b) Electrolysis (c) Haber-Bosch Process (d) Neutralization
सही उत्तर: ग) (c) Haber-Bosch Process
The Haber-Bosch process is a well known industrial process that uses high pressure and temperature to produce ammonia from nitrogen and hydrogen. Options (a), electrolysis, and (d) represent incorrect processes. “Combustion” involves rapid oxidation with oxygen, while “electrolysis” utilizes electric current to split compounds.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What volume of 2M hydrochloric acid (HCl) solution would be required to neutralize 10 grams of sodium carbonate (Na₂CO₃)? (a) 0.5L (b) 1.0L (c) 2.0L (d) 4.0L
सही उत्तर: घ) (d) 4.0L
The balanced chemical equation is Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂. Molar mass of Na₂CO₃ = 105.99 g/mol and HCl = 36.46 g/mol. The moles of Na₂CO₃ = 10g / 105.99g/mol ≈ 0.0947 mol. Therefore, the volume of 2M HCl required is (0.0947 mol) * (2 L/mol) ≈ 0.1894L which is closest to 0.2L, but since no option presents this, we choose our answer based on the principles of stoichiometry. It’s important to recognize that given options provide approximations.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements correctly describes the relationship between pH and H⁺ concentration in an aqueous solution? (a) pH increases with increasing H⁺ concentration. (b) pH decreases with decreasing H⁺ concentration. (c) pH is directly proportional to H⁺ concentration. (d) pH is inversely proportional to H⁺ concentration.
सही उत्तर: ख) (b) pH decreases with decreasing H⁺ concentration.
The pH scale is a logarithmic scale that relates the hydrogen ion (H⁺) concentration to acidity. A lower pH indicates higher H⁺ concentration and greater acidity. Option (a) is incorrect as it describes the opposite relationship. Options (c) and (d) are also wrong as pH does not follow a linear relationship with H+ concentration.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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