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 rectangular metallic plate has dimensions 10 cm x 20 cm. The resistance between two opposite corners is 2 ohms. If the resistance between adjacent corners is 1 ohm, what is the value of the resistivity (ρ) of the metal in ohm-meter (Ωm)?
सही उत्तर: क) 0.05 Ωm
The resistance between opposite corners is calculated using R = ρL/A, where L is the length of the diagonal and A is the area of the plate. The resistance between adjacent corners is R = ρL/W, where W is the width. Solving for ρ in both equations allows us to find that ρ = 0.05 Ωm. The tempting answer of 0.1Ωm is incorrect because it does not account for the geometric relationship between the dimensions and resistances.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements regarding titration with a strong acid and a strong base is most accurate?
सही उत्तर: ख) The pH changes abruptly at the equivalence point
Titrations involving strong acids and bases result in a sharp change (indicated by a sudden shift) in pH at the equivalence point where moles of acid = moles of base. This is because the resulting solution is neutral (pH=7). The other options describe gradual changes or incorrect behavior for titrations with strong acid-base solutions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The dissociation constant (Ka) for a weak acid, HA, in water is 1.8 x 10⁻⁵ at 25°C. What is the concentration of HA in a solution where its initial concentration is 0.1 M?
सही उत्तर: ख) 0.30 M
The dissociation reaction is HA + H₂O ⇌ H₃O⁺ + A⁻. Ka = [H₃O⁺][A⁻] / [HA]. Given Ka, we can calculate the concentration of H₃O⁺ and then use that to determine the initial concentration of HA in solution; therefore, 0.30M is the correct answer. The other options are incorrect because they do not correctly apply the definition of Ka and consider the initial concentration.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements correctly describes the properties of acids? (a) They are always colorless and odorless. (b) They taste bitter and slippery to the touch. (c) They readily donate protons (H⁺) in solution. (d) They are primarily used as oxidizing agents.
सही उत्तर: ग) (c) They readily donate protons (H⁺) in solution.
Option (c) is correct because acids, by definition, release hydrogen ions (protons) when dissolved in water, defining their acidic properties. Option (a) is incorrect as acids can be colored and have distinct smells depending on the acid. Option (b) describes bases, not acids. Option (d) describes oxidizing agents, not acids.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A rectangular field is 15 m long and 10 m wide. What is the area of the field in square meters?
सही उत्तर: क) 150
Area = length * width = 15m * 10m = 150 square meters.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If 6 machines make 12 items in 6 minutes, how many machines will take 18 items to be made?
सही उत्तर: ग) 5
Let x be the number of machines. We have: (6 machines) * (6 minutes) = (12 items). So, 1 machine takes 6 minutes to make 2 items. Therefore, x machines will take (6/2) * 6 / (18/2) = 3*6= 18 minutes to produce 18 items
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Among five numbers, A is greater than B but less than C; D is greater than C and E is the smallest. Which one is the greatest?
सही उत्तर: घ) D
Given: A > B < C, D > C, and E is the smallest. This sequence establishes that C is the largest value.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A completes a task in 8 hours and B completes it in 12 hours. In how many hours will they complete the task together?
सही उत्तर: घ) 10
The work done by A in one hour is 1/8 of the total work, and by B is 1/12. Together they do (1/8 + 1/12) = (3/24 + 2/24) = 5/24 per hour. To complete the whole task, it will take 24/5 = 4.8 hours.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Find the odd one out: 1, 4, 9, 16, 25
सही उत्तर: घ) 25
The numbers 1, 4, 9, and 16 are perfect squares (1^2, 2^2, 3^2, 4^2 respectively). 25 is not a perfect square; therefore, it's the outlier.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which cellular structure plays a direct role in the process of cell signaling by transmitting information from the plasma membrane to the nucleus?
सही उत्तर: ख) Lysosome
The Golgi apparatus processes and packages signals received at the plasma membrane. It modifies these signals and then transmits them further into the cell, particularly to the nucleus where they direct cellular activities. The other structures have distinct functions (waste disposal, protein synthesis, structural support).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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