त्रिवि IT प्रवेश BIT र BCA प्रवेश तयारी
त्रिवि IT प्रवेश – BIT र BCA प्रवेश
TU BIT & BCA Entrance · TU IT Entrance (B.Sc. CSIT, BIT, BCA)
२,६०७ प्रश्न उपलब्ध। मोड छान्नुहोस्:
IT 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 numbers of protons and neutrons in ³⁷₁₇Cl are respectively:
सही उत्तर: घ) 17 and 20
Protons = Z = 17; neutrons = A − Z = 37 − 17 = 20.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Gay-Lussac's law of gaseous volumes states that gases react with one another in volumes that:
सही उत्तर: ख) bear a simple whole-number ratio (at the same temperature and pressure)
For example, 2 volumes of H₂ react with 1 volume of O₂ to give 2 volumes of steam, a simple ratio 2 : 1 : 2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The law of conservation of mass was established by:
सही उत्तर: ग) Antoine Lavoisier
Lavoisier showed by careful weighing that the total mass of substances does not change in a chemical reaction.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The equivalent weight of aluminium (atomic mass 27, valency 3) is:
सही उत्तर: ग) 9
Equivalent weight = atomic mass/valency = 27/3 = 9.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The mass of 0.5 mol of sodium hydroxide (NaOH) is (Na = 23, O = 16, H = 1):
सही उत्तर: ग) 20 g
Molar mass of NaOH = 40 g/mol, so mass = 0.5 × 40 = 20 g.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The number of moles in 36 g of water (H₂O = 18 g/mol) is:
सही उत्तर: घ) 2
n = mass/molar mass = 36/18 = 2 mol.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A satellite orbits the Earth in a circular orbit. If its orbital radius is increased, its total mechanical energy:
सही उत्तर: ख) increases (becomes less negative)
E = −GMm/(2r); as r increases, E becomes less negative, i.e. increases.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A block slides from rest down a smooth incline of 30° through a distance of 10 m along the incline. Its speed at the bottom is (g = 10 m/s²):
सही उत्तर: क) 10 m/s
a = g sin 30° = 5 m/s²; v = √(2as) = √(2 × 5 × 10) = 10 m/s.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two equal point charges +q are placed a distance 2a apart. The electric potential at the midpoint between them is (k = 1/(4πε₀)):
सही उत्तर: घ) 2kq/a
Potential is a scalar: V = kq/a + kq/a = 2kq/a (whereas the field there is zero).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A block given a speed of 6 m/s slides on a rough horizontal floor with coefficient of kinetic friction 0.3. The distance it travels before stopping is (g = 10 m/s²):
सही उत्तर: क) 6 m
Retardation = μg = 3 m/s²; s = v²/(2a) = 36/6 = 6 m.
💬 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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