मेडिकल प्रवेश (CEE) – Physics, Chemistry, Zoology, Botany, MAT
मेडिकल प्रवेश (CEE) – Physics, Chemistry, Zoology, Botany, MAT
Medical Entrance (CEE) – Physics, Chemistry, Biology & MAT · २,०३९ प्रश्न
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
CEE 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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If the digits in the number 789 are arranged in random order to form a new number, what is the probability that the number formed is divisible by 3?
सही उत्तर: क) 1/6
A number is divisible by 3 if the sum of its digits is divisible by 3. The sum of the digits in 789 is 7+8+9 = 24, which is divisible by 3. There are 3! = 6 ways to arrange the digits (789, 798, 879, 897, 978, 987). Since the sum of the digits is always 24 (which is divisible by 3), all arrangements will result in a number divisible by 3. Therefore, the probability is 6/6 = 1.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A man walks 1 km East, then 3 km North, then 2 km West and finally 1 km South. In how many kilometers from his starting point he is?
सही उत्तर: ख) 4 km
The man first walks 1km East and then 2km West so he nets -1km in the East-West direction. He then walks 3km North and finally 1km South, netting a net of 2km North. Thus the position is 2 km from starting point.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a code language, 'pit nar sik' means 'good sweet fruit', 'lo nar tok' means 'very good boy' and 'nar bik tok' means 'delicious food'. What does ‘sik bik’ mean?
सही उत्तर: क) sweet water
The code is based on direct translations of the phrases. ‘pit nar sik’ translates to ‘good sweet fruit’, and similarly, ‘sik bik’ would translate to 'delicious food' because ‘bik’ means ‘food’. The other options are unrelated translations or incorrect interpretations.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A current-carrying wire of length 10 cm is placed in a uniform magnetic field of strength 0.2 Tesla. If the force on the wire is 8 mN, what is the angle between the direction of the wire and the magnetic field?
सही उत्तर: ख) 60°
The force on a current-carrying wire in a magnetic field is given by F = IlBsinθ, where I is the current, B is the magnetic field strength, and θ is the angle between the wire and the magnetic field. Rearranging to solve for sinθ: sinθ = F / (IlB). So sinθ = 8 mN / (10 cm * I * 0.2 T) = 0.4. Therefore, θ = arcsin(0.4), which is approximately 23.57°, closer to the 45° option but more accurately it's 23 degrees or close to 30 because this question makes use of sine approximation
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A particle of mass 1 kg moves in a circle of radius 2m with a constant speed of 5 m/s. Its kinetic energy is:
सही उत्तर: क) 10 J
The kinetic energy (KE) of the particle is given by KE = (1/2)mv², where m=1 kg and v=5 m/s. Therefore, KE = (1/2)(1 kg)(5 m/s)² = 12.5 J. The option ‘10J’ is incorrect because it does not match the calculation. ‘2.5J’ and ‘5.0J’ are less than the calculated value.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction between hydrochloric acid (HCl) and sodium carbonate (Na₂CO₃) produces carbon dioxide gas, water, and sodium chloride. Which of the following is the primary evidence demonstrating that a chemical reaction has occurred?
सही उत्तर: घ) A decrease in temperature.
The production of a gas (carbon dioxide – CO₂) is a clear indicator of a chemical reaction. Chemical reactions involve the breaking and forming of bonds, resulting in new substances with different properties, including gaseous products. The other changes listed are typically observed in physical changes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following compounds will exhibit the largest positive value for its enthalpy of formation (ΔHf)?
सही उत्तर: घ) C₆H₁₂O₆(s)
The enthalpy of formation is negative for compounds formed from simpler elements. Water (H₂O) has the largest positive value for its ΔHf because it's formed from two highly electronegative elements (oxygen and hydrogen). The other options are hydrocarbons or carbohydrates which are generally more stable and have a smaller (more negative) ΔHf.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The decomposition of hydrogen peroxide (H₂O₂) catalyzed by manganese dioxide (MnO₂) produces oxygen gas and water. Which statement best explains why MnO₂ is used as a catalyst?
सही उत्तर: ग) It increases the concentration of H₂O₂ in solution.
A catalyst works by lowering the activation energy required for a chemical reaction to occur. MnO₂ provides an alternative pathway with a lower energy barrier, speeding up the decomposition without being consumed itself. The other options describe incorrect mechanisms of catalysis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction between sodium hydroxide (NaOH) and carbon dioxide (CO₂) produces a weak acid. What is the primary chemical species responsible for this acidification?
सही उत्तर: घ) Hydroxide ion (OH⁻)
The reaction between NaOH and CO₂ produces sodium bicarbonate (NaHCO₃). This compound is an unstable salt that readily decomposes in water to form carbonic acid (H₂CO₃), a weak acid. The other options are stable salts and do not contribute to acidification.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Find the next term in the series: RED, ORANGE, YELLOW, GREEN, ?
सही उत्तर: क) BLUE
The sequence is based on colors of the rainbow. The question asks for the next color following GREEN which is BLUE.
💬 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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