Gases & Ideal Gas Law

Cover PV=nRT, Boyle, and gas behavior. Ideal for board exams and competitive test prep.

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QUESTION NO 01

The ideal gas equation is?

Answer: PV = nRT

Ideal gases obey PV = nRT.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 02

Enthalpy change at constant pressure equals?

Answer: Heat exchanged (qp)

ΔH = qp for a constant-pressure process.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 03

A catalyst increases rate by?

Answer: Lowering activation energy

Catalysts provide a lower-Ea pathway; Keq is unchanged.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 04

First-order half-life is?

Answer: Independent of initial concentration

For first-order, t½ = ln2/k.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 05

Osmotic pressure of a dilute solution is given by?

Answer: π = CRT

van't Hoff: π = CRT for dilute solutions.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 06

Entropy of an isolated system in a spontaneous process?

Answer: Increases or stays the same

Second law: entropy of an isolated system does not decrease.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 07

Raoult's law relates vapor pressure to?

Answer: Mole fraction of solvent/solute

pᵢ = xᵢ pᵢ° for ideal solutions.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 08

Buffer solutions resist changes in?

Answer: pH

Buffers contain a weak acid/base conjugate pair that stabilizes pH.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 09

Hess's law is based on?

Answer: Path independence of enthalpy (state function)

ΔH depends only on initial and final states.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 10

Colligative properties depend on?

Answer: Number of solute particles

Boiling-point elevation, freezing-point depression, etc., depend on particle count.

Shahzad Mahota @shahzad-mahota

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Gases & Ideal Gas Law

The ideal gas equation is?

Enthalpy change at constant pressure equals?

A catalyst increases rate by?

First-order half-life is?

Osmotic pressure of a dilute solution is given by?

Entropy of an isolated system in a spontaneous process?

Raoult's law relates vapor pressure to?

Buffer solutions resist changes in?

Hess's law is based on?

Colligative properties depend on?

Published By

Shahzad Mahota

00

00

00

00

00

00

Gases & Ideal Gas Law

The ideal gas equation is?

Explanation

Enthalpy change at constant pressure equals?

Explanation

A catalyst increases rate by?

Explanation

First-order half-life is?

Explanation

Osmotic pressure of a dilute solution is given by?

Explanation

Entropy of an isolated system in a spontaneous process?

Explanation

Raoult's law relates vapor pressure to?

Explanation

Buffer solutions resist changes in?

Explanation

Hess's law is based on?

Explanation

Colligative properties depend on?

Explanation

Published By

Shahzad Mahota

00

00

00

00

00

00

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