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रसायन विज्ञान – Chemistry MCQ

रसायन विज्ञान – कृषि/वन प्रवेश

Chemistry · Agriculture, Veterinary & Forestry Entrance · ४०३ प्रश्न

सबै विषय जीव विज्ञान रसायन विज्ञान भौतिक विज्ञान अङ्ग्रेजी कृषि र वन सामान्य ज्ञान

४०३ प्रश्न उपलब्ध। मोड छान्नुहोस्:

रसायन विज्ञान: प्रश्न र उत्तर

सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।

  1. Which of the following statements correctly describes the role of enzymes in biochemical reactions? (a) Enzymes are consumed during chemical reactions and are permanently altered. (b) Enzymes accelerate reaction rates by lowering activation energies without being permanently changed themselves. (c) Enzymes act as catalysts, producing new reactants from existing ones. (d) Enzymes have no effect on reaction rates; their presence merely facilitates the mixing of reactants.

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  2. The chemical formula for hydrochloric acid (HCl) represents: (a) A covalent compound formed by the sharing of electrons. (b) An ionic compound formed by the electrostatic attraction between hydrogen and chlorine atoms. (c) A strong reducing agent used in various industrial processes. (d) A weak acid that readily dissociates in water.

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  3. The neutralization reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) produces which salt? (Molar mass HCl = 36.5 g/mol, Molar mass NaOH = 40 g/mol)

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    टिप्पणी जाँचपछि मात्र देखिन्छ।

  4. A solution has a molarity of 0.5 M and contains 2 moles of solute. What is the volume of the solution in liters? (Molar Volume of ideal gas = 22.4L/mol)

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  5. Which of the following acids is commonly found in volcanic regions and contributes to corrosion? (Molar mass H₂SO₄ = 98 g/mol)

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  6. The percentage by mass of sodium chloride (NaCl) in a solution containing 10g of NaCl dissolved in 500g of water is approximately what? (Molar mass of NaCl = 58.44 g/mol)

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  7. The process of converting ammonia (NH₃) into nitric acid (HNO₃) in the atmosphere is called:

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  8. What volume of 0.5 M hydrochloric acid (HCl) is required to completely neutralize 10 cm³ of 1 M sodium hydroxide (NaOH) solution? (Molar mass of HCl = 36 g/mol, Molar mass of NaOH = 40 g/mol)

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  9. The decomposition of potassium nitrate (KNO₃) produces potassium nitrite (KN₂O₂) and oxygen gas. Which statement correctly describes the balanced chemical equation for this reaction?

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  10. The process of dissolving a solid ionic compound like sodium chloride (NaCl) in water involves the formation of ions. Which of the following best describes the primary interaction responsible for this dissolution?

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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।