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
-
What is the oxidation number of sulfur in H₂SO₄?
सही उत्तर: ख) +6
In H₂SO₄, sulfur has a +6 oxidation state. Oxygen typically has -2, and since there are two oxygen atoms, their contribution is -4. The hydrogen atoms contribute +2. Therefore, the overall charge is 0 (+2 - 4 = -2, which cancels out with the two hydrogens). The most tempting option (+2) arises from considering only the sulfate ion, ignoring the hydrogen.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The mass percentage of oxygen in H₂O₂ is calculated as follows. If 23 g of H₂O₂ are dissolved in 100 g of water, what is the mass percentage of oxygen (O) in the solution? (Atomic masses: H = 1, O = 16)
सही उत्तर: ख) 16.00%
The formula for calculating percentage composition is (mass of element / mass of compound) * 100%. In H₂O₂, the mass of oxygen is 2 * 16 = 32 g, and the mass of the compound is 2 * 1 + 2 * 16 = 34 g. Therefore, (32/34)*100% = 94.12%. The most tempting option (8.16%) arises from a misunderstanding of the calculation – it’s not directly calculating oxygen percentage but rather how much of the compound is oxygen.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
What is the pH value of a solution containing [H⁺] = 1 × 10⁻⁵ M?
सही उत्तर: क) 5
pH is defined as -log[H⁺]. Therefore, pH = -log(1 × 10⁻⁵) = 5. The other options represent incorrect calculations or assumptions about the pH scale.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The following represents an endothermic process:
सही उत्तर: घ) Condensation of water vapor
Endothermic reactions absorb heat from the surroundings, leading to a temperature increase. The rusting of iron is an example as it requires energy input. Combustion and condensation are exothermic processes releasing heat.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The molar mass of glucose (C₆H₁₂O₆) is approximately 180 g/mol. What is the mass (in grams) of oxygen present in 36 g of glucose?
सही उत्तर: ख) 36
The balanced equation for the combustion of glucose is C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O. We can calculate the mass of oxygen by using stoichiometry. The molar ratio between glucose and oxygen is 1:6. Therefore, in 36g of glucose (6 moles), 6 * 6 = 36 g of oxygen is produced. The other options represent incorrect calculations or assumptions about the reaction.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
What is the percentage yield of carbon dioxide gas when 4.4 g of ethanol (C₂H₅OH) are completely oxidized according to the following equation? C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
सही उत्तर: ख) 83%
The balanced equation shows that 1 mole of ethanol produces 2 moles of carbon dioxide. The molar mass of ethanol is 46 g/mol and of CO₂ is 44 g/mol. Therefore, 4.4g / 44 g/mol = 0.1 mole of CO₂ is produced. The percentage yield is (0.1 * 100) / (theoretical yield). The tempting incorrect options relate to other oxidation products or incorrect calculations regarding the stoichiometric ratios.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following best replaces the underlined word in this sentence: ‘The farmer used a rake to _____ the fallen leaves.’ Options: [Harvest, Collect, Scatter, Preserve]
सही उत्तर: ग) Scatter
‘Scatter’ is the most appropriate verb here, suggesting spreading out the leaves with a rake. ‘Harvest’, ‘collect’ and ‘preserve’ have different connotations related to farming activities.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Select the word that best describes a person who is skilled in the art of forestry. Options: [Agriculturist, Forester, Engineer, Architect]
सही उत्तर: ख) Forester
A ‘forester’ is specifically trained and knowledgeable about forest management and conservation. The other options represent different professions with unrelated skills.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Choose the correct form of the verb to complete this sentence: ‘If I were you, I _____ travel alone.’ Options: [Would, Will, Could, May]
सही उत्तर: क) Would
The conditional ‘if’ clause uses the past subjunctive form of the verb ‘be’ – ‘were’. This correctly constructs the hypothetical sentence. The other options represent alternative tenses that would be grammatically incorrect in this context.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following best completes this sentence: ‘Despite his efforts, he remained _____.’ Options: [Successful, Persistent, Unfortunate, Optimistic]
सही उत्तर: ग) Unfortunate
‘Persistent’ describes someone who continues despite difficulties, fitting the context of ‘remained’. The other options present states of success or happiness that don't align with the sentence's implication.
💬 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।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।