विज्ञान (भौतिक, रसायन, जीव) – Science MCQ
विज्ञान (भौतिक, रसायन, जीव) – CTEVT स्वास्थ्य प्रवेश
Science · CTEVT Health Entrance (PCL & Diploma) · ४११ प्रश्न
४११ प्रश्न उपलब्ध। मोड छान्नुहोस्:
विज्ञान (भौतिक, रसायन, जीव): 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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In green plants, photosynthesis takes place in the:
सही उत्तर: क) Chloroplast
Chloroplasts contain chlorophyll, which traps light energy to make glucose from CO₂ and water.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bile, which helps in the digestion of fats, is stored in the:
सही उत्तर: घ) Gall bladder
Bile is produced by the liver and stored in the gall bladder; it emulsifies fats in the small intestine.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Digestion of proteins begins in the stomach by the action of the enzyme:
सही उत्तर: ग) Pepsin
Pepsin, active in acidic gastric juice, breaks proteins into peptides; ptyalin in saliva acts on starch.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The structural and functional unit of the kidney is:
सही उत्तर: ख) Nephron
Each kidney has about a million nephrons, which filter blood and form urine.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Solution A has pH 2 and solution B has pH 5. Compared with B, the hydrogen ion concentration of A is:
सही उत्तर: घ) 1000 times greater
pH is a logarithmic scale; a difference of 3 units means 10³ = 1000 times difference, and lower pH means more H⁺ ions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The bond in sodium chloride (NaCl) is formed by:
सही उत्तर: ग) Transfer of an electron from sodium to chlorine
Na loses one electron to become Na⁺ and Cl gains it to become Cl⁻; the attraction between them is an ionic (electrovalent) bond.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In terms of electrons, oxidation is defined as:
सही उत्तर: ख) Loss of electrons
Oxidation is loss of electrons and reduction is gain of electrons (OIL RIG).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Temporary hardness of water, which can be removed by boiling, is caused by:
सही उत्तर: क) Bicarbonates of calcium and magnesium
On boiling, Ca(HCO₃)₂ and Mg(HCO₃)₂ decompose into insoluble carbonates that settle out; chlorides and sulphates cause permanent hardness.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following metals is the most reactive?
सही उत्तर: घ) Potassium
In the reactivity series potassium is near the top, while iron, copper and silver lie progressively lower.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Lime water turns milky when which gas is passed through it?
सही उत्तर: ग) Carbon dioxide
CO₂ reacts with Ca(OH)₂ to form insoluble calcium carbonate: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O.
💬 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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