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A. 1.67
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B. 1.5
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C. 1.6
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D. 1.4
Explanation
For a diatomic gas (like O₂ or N₂), the ratio of specific heats 𝐶𝑝/𝐶𝑣 is approximately 1.4.
This ratio is also known as the adiabatic index (γ).
It is used in thermodynamic processes.
گیسوں کی کثافت اس وقت بڑھتی ہے جب اس کا ______ ہے؟
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A. Pressure increased
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B. Volume increased
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C. Temperature increased
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D. None of these
Explanation
- When the pressure on a gas increases, the molecules are forced closer together, resulting in a higher density.
- This is because the volume of the gas decreases as the pressure increases, causing the molecules to be more concentrated.
مندرجہ ذیل میں سے کون سی گیس سب سے تیزی سے پھیلتی ہے؟
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A. Fluorine
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B. Hydrogen
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C. Helium
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D. Chlorine
Explanation
- Hydrogen (H2) is the lightest molecule, with a molecular weight of 2.016 g/mol.
- According to Graham's Law of Diffusion, the rate of diffusion of a gas is inversely proportional to the square root of its molecular weight.
- Therefore, hydrogen diffuses the fastest.
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