नमस्ते · Hello

विद्या ददाति विनयं विनयाद् याति पात्रताम्।

विद्याले विनम्रता दिन्छ, विनम्रताबाट योग्यता आउँछ।

Knowledge gives humility, and humility makes one worthy.

…

रसायन विज्ञान – Chemistry MCQ

रसायन विज्ञान – कृषि/वन प्रवेश

Chemistry · Agriculture, Veterinary & Forestry Entrance · ३९९ प्रश्न

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

३९९ 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. The decomposition of ammonium nitrite ((NH₄)₂NO₂) produces nitrogen gas (N₂), water (H₂O), and is a classic example of:

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  2. Liquefied petroleum gas (LPG) used for cooking consists mainly of: (a) Methane and Ethane (b) Propane and Butane (c) Carbon Monoxide and Hydrogen (d) Nitrogen and Oxygen

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  3. Packets of potato chips are filled with nitrogen gas mainly to: (a) Increase the shelf life of the chips. (b) Reduce the moisture content in the chips. (c) Maintain the crispness of the chips. (d) Enhance the flavor of the chips.

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  4. The number of isomers possible for C₄H₁₀ (butane) is?

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  5. What is the main purpose of using a reducing agent in redox titrations? (a) To increase the concentration of the analyte. (b) To measure the volume of the titrant required to react completely with the analyte. (c) To oxidize the analyte, making it easier to determine its concentration. (d) To prevent the formation of precipitates.

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  6. The oxidation number of carbon in CO₂ is: (a) +2 (b) -2 (c) +4 (d) 0

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  7. 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.

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  8. 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.

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  9. 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)

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

  10. 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)

    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    टिप्पणी जाँचपछि मात्र देखिन्छ।

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।