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Gas Laws and Mole Concept
Chemistry · Kerala SSLC (Class 10) · English Medium · 40 questions and answers
Sample questions
- Q: State Boyle's law.
- A: At constant temperature, the volume of a fixed mass of gas is inversely proportional to its pressure. PV = constant, so P₁V₁ = P₂V₂.
- Q: State Charles's law.
- A: At constant pressure, the volume of a fixed mass of gas is directly proportional to its absolute (Kelvin) temperature. V/T = constant, so V₁/T₁ = V₂/T₂.
- Q: How do you convert a temperature in degrees Celsius to Kelvin?
- A: Add 273 to the Celsius value: T(K) = t(°C) + 273. Example: 27°C = 300 K.
- Q: State Avogadro's law.
- A: Equal volumes of all gases at the same temperature and pressure contain an equal number of molecules.
- Q: What is the value of Avogadro's number?
- A: 6.022 × 10²³ — the number of particles (atoms, molecules or ions) in one mole of a substance.
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