चिकित्सा शिक्षा आयोग (CEE) पारामेडिकल (B.Pharm, BPH, BMLT, BMIT, B.Optom) तयारी
चिकित्सा शिक्षा आयोग (CEE) – पारामेडिकल (B.Pharm, BPH, BMLT, BMIT, B.Optom)
Paramedical Bachelor Entrance · Medical Education Commission – CEE
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MBBS/BDS/Nursing 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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A farmer has chickens and cows. He counts his animals and finds that he has 70 legs. If there are twice as many chickens as cows, how many cows does he have?
सही उत्तर: ख) 14
Let 'c' be the number of cows and 'x' be the number of chickens. We know that x = 2c (twice as many chickens). Each cow has 4 legs and each chicken has 2. So, 4c + 2x = 70. Substituting x = 2c gives us 4c + 2(2c) = 70, which simplifies to 8c = 70. Therefore, c = 70/8 = 8.75. Option 1 (10) is incorrect, option 2 (14) and 3(20) are also inaccurate calculations.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements accurately describes the function of erythrocytes (red blood cells)? (a) They primarily transport oxygen throughout the body. (b) They facilitate nerve impulse transmission. (c) They play a crucial role in immune responses against pathogens. (d) They are responsible for blood clotting and vasoconstriction.
सही उत्तर: क) (a) They primarily transport oxygen throughout the body.
Option (a) is correct because erythrocytes’ primary function is transporting oxygen bound to hemoglobin from the lungs to tissues throughout the body. Options (b), (c), and (d) represent functions of other cell types like neurons, lymphocytes, and platelets respectively.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The density of solid carbon is 3.5 g/cm³. The mass of a piece of carbon that occupies a volume of 10 cm³ would be:
सही उत्तर: ग) 10 g
Density = Mass / Volume. Mass = Density × Volume. Therefore, the mass is 3.5 g/cm³ × 10 cm³ = 35 g. Options ‘3.5 g’, ‘7.0 g’ and ‘10g’ are incorrect, as they either use the volume or density value inaccurately.”}]}”,
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The titration of a monoprotic acid (HA) with a strong base (NaOH) will proceed fastest when the concentration of both solutions is:
सही उत्तर: ग) Equal
Titration rates are maximized at equal concentrations of the titrant and analyte. This ensures a constant rate of reaction until all of one reactant is consumed. Higher or lower concentrations will result in slower, less consistent reaction rates.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following oxides of nitrogen primarily contributes to the formation of smog in urban areas?
सही उत्तर: घ) NO₂
Nitrogen dioxide (NO₂) is a key component of photochemical smog. It's formed from reactions between NO and O₃ under sunlight. N₂O, N₂O₄ and NO are all associated with different stages of smog formation but NO₂ is the most directly responsible for its characteristic color and harmful effects. The other choices are often precursors to smog but aren’t primary contributors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction between hydrochloric acid (HCl) and sodium carbonate (Na₂CO₃) produces carbon dioxide gas. Which of the following observations would BEST confirm this production?
सही उत्तर: ग) Evolution of bubbles of gas.
The reaction between HCl and Na₂CO₃ is an acid-base neutralization that produces carbon dioxide gas, which escapes as bubbles. Option 2 correctly identifies this observation. The other options represent different chemical reactions or physical changes that would not confirm the production of CO₂.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The standard enthalpy of formation of H₂O(l) at 298 K is 0 kJ/mol. Which of the following reactions has the largest positive change in enthalpy?
सही उत्तर: ख) 2H₂(g) + O₂(g) → 2H₂O(l)
The reaction 2H₂(g) + O₂(g) → 2H₂O(l) is the only one that forms two moles of water from its elements, thus releasing the most energy (largest positive enthalpy change). The other options either consume water or produce steam, resulting in different enthalpy changes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A charged particle enters a uniform magnetic field with a velocity of 5 m/s perpendicular to the field, where the magnetic field strength is 0.2 Tesla. What is the magnitude of the force acting on the charged particle? (Assume the charge of the particle is 1.6 x 10⁻¹⁹ C)
सही उत्तर: क) 8 × 10⁻² N
The force on a charged particle moving in a magnetic field is given by F = qvBsin(θ), where q is the charge, v is the velocity, B is the magnetic field strength, and θ is the angle between the velocity and the magnetic field. In this case, the velocity is perpendicular to the field, so θ = 90°, sin(90°) = 1. The magnitude of the force is qvB.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the year 2023, a radioactive material has a mass of 100 g with a half-life of 10 years. What was the initial mass (in grams) of the material at the beginning of 2023?
सही उत्तर: ग) 200
The half-life is the time it takes for half of the material to decay. From the beginning of 2023, 10 years have passed, so there are two half-lives. Therefore the remaining mass is 100g/2^2 = 100g/4=25g This option is wrong and others are more complex.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A galvanometer having a resistance of 60 ohms gives a full-scale deflection for a current of 1 milliampere. It is used to measure the current in a circuit with a resistance of 40 ohms. What is the reading on the galvanometer in milliamperes?
सही उत्तर: घ) 0.2 A
The current through the galvanometer is calculated using Ohm's law (I = V/R) where V is the voltage across the galvanometer and R is its resistance. The full-scale deflection corresponds to a certain current. We calculate the current in the circuit with 40 ohms, and then relate that current to the galvanometer reading by considering the ratio of resistances. The tempting answer '0.02A' is too low.
💬 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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