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The Gaseous state

Telangana Open School (TOSS) · Class 12 · Chemistry

Flashcards for The Gaseous state — Telangana Open School (TOSS) Class 12 Chemistry. Quick Q&A cards covering key concepts, definitions, and formulas.

52 questions30 flashcards5 concepts

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Card 1Gas Laws

State Boyle's Law and give its mathematical expression.

Answer

Boyle's Law states that at constant temperature, the volume of a given mass of gas is inversely proportional to its pressure. Mathematically: $$ V \propto \frac{1}{p} \quad \text{or} \quad p_1V_1 =

Card 2Gas Laws

What happens to the volume of a gas when pressure is doubled at constant temperature?

Answer

According to Boyle's Law, volume is inversely proportional to pressure. If pressure is doubled, volume becomes half of the original. Example: If initial volume = 4 L, final volume = 2 L.

Card 3Gas Laws

A gas occupies 800 mL at 0.5 atm. What will be its volume at 1 atm if temperature is constant?

Answer

Using Boyle's Law: $ p_1V_1 = p_2V_2 $ Given: - $ p_1 = 0.5 $ atm - $ V_1 = 800 $ mL - $ p_2 = 1 $ atm - $ V_2 = ? $ $$ V_2 = \frac{p_1V_1}{p_2} = \frac{0.5 \times 800}{1} = 400 \text{ mL} $$ Answe

Card 4Gas Laws

State Charles' Law with mathematical expression.

Answer

Charles' Law states that at constant pressure, the volume of a given mass of gas is directly proportional to its absolute temperature. Mathematically: $$ V \propto T \quad \text{or} \quad \frac{V_1}{

Card 5Gas Laws

Convert 25°C to Kelvin.

Answer

To convert Celsius to Kelvin, add 273: $$ T(K) = t(°C) + 273 = 25 + 273 = 298 \text{ K} $$

Card 6Gas Laws

A gas occupies 2 L at 300 K. What volume will it occupy at 450 K (pressure constant)?

Answer

Using Charles' Law: $ \frac{V_1}{T_1} = \frac{V_2}{T_2} $ Given: - $ V_1 = 2 $ L - $ T_1 = 300 $ K - $ T_2 = 450 $ K - $ V_2 = ? $ $$ V_2 = \frac{V_1 \times T_2}{T_1} = \frac{2 \times 450}{300} = 3

Card 7Gas Laws

What is absolute zero? Give its value in °C and K.

Answer

Absolute zero is the lowest possible temperature where the volume of an ideal gas becomes zero. - In Kelvin: 0 K - In Celsius: -273°C It is the theoretical limit; gases liquefy before reaching this

Card 8Gas Laws

State Avogadro's Law.

Answer

Avogadro's Law states that equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules. Mathematically: $$ V \propto n \quad \text{(at constant T and P)} $$ w

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What are the important topics in The Gaseous state for Telangana Open School (TOSS) Class 12 Chemistry?
The Gaseous state covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
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