आईओई इन्जिनियरिङ प्रवेश (त्रिवि) BE / B.Arch प्रवेश परीक्षा तयारी
आईओई इन्जिनियरिङ प्रवेश (त्रिवि) – BE / B.Arch प्रवेश परीक्षा
IOE BE / B.Arch Entrance · IOE Entrance (TU)
३,८४१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
BE/B.Arch 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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The negation of 'For every real number x, x² ≥ 0' is:
सही उत्तर: ख) There exists a real number x such that x² < 0
Negating a universal statement gives an existential statement with the condition negated: ∃x such that x² < 0.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The compound statement p ∨ ~p is:
सही उत्तर: ख) a tautology
p ∨ ~p is true for every truth value of p, so it is a tautology (law of excluded middle).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The conditional statement p → q is logically equivalent to:
सही उत्तर: ग) ~p ∨ q
p → q is false only when p is true and q is false, which is exactly when ~p ∨ q is false.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The contrapositive of the conditional statement p → q is:
सही उत्तर: घ) ~q → ~p
The contrapositive of p → q is ~q → ~p, and it is logically equivalent to the original statement.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The negation of the statement 'p ∧ q' is logically equivalent to:
सही उत्तर: क) ~p ∨ ~q
By De Morgan's law, ~(p ∧ q) ≡ ~p ∨ ~q.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the Wolff–Kishner reduction, a carbonyl group is converted to a CH₂ group by heating with:
सही उत्तर: ख) hydrazine and KOH in ethylene glycol
The carbonyl compound forms a hydrazone, which is decomposed by strong base at high temperature to give the hydrocarbon (Zn-Hg/HCl is the Clemmensen reduction).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 40% aqueous solution of formaldehyde is known as:
सही उत्तर: घ) formalin
Formalin (about 40% HCHO in water) is used to preserve biological specimens.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Phenol gives a violet colour with:
सही उत्तर: ख) neutral ferric chloride solution
Phenols form a coloured complex (violet for phenol) with neutral FeCl₃; this is a common test for phenols.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Toluene is oxidised by hot alkaline KMnO₄, followed by acidification, to:
सही उत्तर: ख) benzoic acid
The side-chain methyl group on a benzene ring is oxidised completely to –COOH.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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meso-Tartaric acid is optically inactive because:
सही उत्तर: ग) it has an internal plane of symmetry
It has two chiral carbons, but the molecule has a plane of symmetry, so the rotations cancel internally (internal compensation).
💬 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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