CTEVT डिप्लोमा इन्जिनियरिङ डिप्लोमा इन सिभिल/कम्प्युटर/इलेक्ट्रिकल प्रवेश तयारी
CTEVT डिप्लोमा इन्जिनियरिङ – डिप्लोमा इन सिभिल/कम्प्युटर/इलेक्ट्रिकल प्रवेश
CTEVT Diploma Entrance · CTEVT Diploma in Engineering
१,५७१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
CTEVT डिप्लोमा इन्जिनियरिङ 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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When hydrochloric acid reacts with sodium hydroxide, the salt formed is:
सही उत्तर: क) Sodium chloride
HCl + NaOH → NaCl + H₂O; this is a neutralisation reaction giving salt and water. No gas is released.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following solutions is the most acidic?
सही उत्तर: ग) A solution of pH 2
Lower pH means higher acidity; pH 2 is strongly acidic. pH 7 is neutral and values above 7 are basic.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An element with atomic number 16 is placed in the modern periodic table in:
सही उत्तर: घ) Period 3, Group 16
Configuration 2, 8, 6 has three shells (period 3) and six valence electrons (group 16). This element is sulphur.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An atom of sodium has atomic number 11 and mass number 23. The number of neutrons in its nucleus is:
सही उत्तर: ख) 12
Neutrons = mass number − atomic number = 23 − 11 = 12. 11 is the number of protons (and electrons).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An element has atomic number 12. Its valency is:
सही उत्तर: ख) 2
Its configuration is 2, 8, 2; it loses its 2 outer electrons, so valency is 2. This element is magnesium.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The volume occupied by 2 moles of a gas at STP is:
सही उत्तर: क) 44.8 L
One mole of any gas at STP occupies 22.4 L, so 2 moles occupy 44.8 L. 22.4 L is for only one mole.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When 100 g of calcium carbonate is completely decomposed by heating (CaCO₃ → CaO + CO₂), the mass of carbon dioxide formed is (Ca = 40, C = 12, O = 16):
सही उत्तर: क) 44 g
100 g CaCO₃ is 1 mole and gives 1 mole of CO₂ = 44 g. 56 g is the mass of CaO formed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the balanced equation N₂ + x H₂ → 2NH₃, the value of x is:
सही उत्तर: घ) 3
There are 6 H atoms in 2NH₃, so 3H₂ is needed. 6 would put 12 hydrogen atoms on the left.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Calcium has valency 2 and the phosphate radical has valency 3. The formula of calcium phosphate is:
सही उत्तर: ख) Ca₃(PO₄)₂
Criss-crossing valencies gives Ca₃(PO₄)₂, where total positive charge 3 × 2 = 6 equals total negative charge 2 × 3 = 6. Ca₂(PO₄)₃ wrongly places the valencies.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Aluminium has valency 3 and oxygen has valency 2. The formula of aluminium oxide is:
सही उत्तर: घ) Al₂O₃
By criss-crossing the valencies, Al gets 2 and O gets 3, giving Al₂O₃. Al₃O₂ results from not crossing the valencies.
💬 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।
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