Chemistry Quiz on Laws of Composition

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What does the Law of Definite Proportion state about pure compounds?

The elements in a pure compound can be combined in multiple ways.

The elements in a pure compound are always in the same ratio by volume.

The composition of a pure compound is always the same regardless of its source. (correct)

The mass of pure compounds varies with their source.

Which of the following accurately defines a physical change?

A change that results in a new substance being formed.

A change that always leads to an increase in temperature.

A change that can be observed or measured without altering the identity of matter. (correct)

A change that alters the chemical structure of a substance.

What principle does the Law of Multiple Proportions illustrate?

Atoms of different elements can combine in multiple different ratios to form compounds. (correct)

All compounds formed will contain the same elements in identical ratios.

The ratios of atoms in compounds are only observed in gaseous states.

Elements must combine in equal mass proportions only.

What does the Law of Conservation of Mass state?

The total mass of substances involved in a chemical reaction remains constant. Signup and view all the answers

Which of the following is an example of a chemical change?

Burning paper. Signup and view all the answers

Which of the following is an example of an intensive property?

Density Signup and view all the answers

What is defined as the amount of space occupied by an object?

Volume Signup and view all the answers

Which of the following substances has a cubic crystal system?

Sodium Chloride (NaCl) Signup and view all the answers

Which property is dependent on the amount of matter present?

Volume Signup and view all the answers

Which of the following best describes matter?

Anything that has mass and occupies space Signup and view all the answers

Which of the following is NOT an extensive property?

Boiling point Signup and view all the answers

Which of the following properties can be classified as intrinsic?

Melting point Signup and view all the answers

What is the relationship between mass and weight?

Weight is mass multiplied by gravity Signup and view all the answers

Which state of matter has a definite shape and volume?

Solid Signup and view all the answers

What is the primary characteristic of gases in terms of volume?

Indefinite volume Signup and view all the answers

Which of the following statements is true about compounds?

Composed of two or more elements chemically united Signup and view all the answers

Which state of matter exhibits weak intermolecular forces and allows for gliding motion?

Liquid Signup and view all the answers

What effect does increasing the pressure of a gas have on its solubility?

Increases solubility Signup and view all the answers

Which of the following best describes a pure substance?

Has a uniform and definite composition Signup and view all the answers

What happens to the solubility of a gas in a liquid when the particle size increases?

Decreases Signup and view all the answers

Which mixture characteristic involves substances not being chemically combined?

Mixture Signup and view all the answers

What is the term for the maximum amount of solute that can be dissolved in 100g of water?

Solubility Signup and view all the answers

Which theory describes acids as proton donors?

Bronsted-Lowry Theory Signup and view all the answers

How does an increase in temperature affect the solubility of a gas in a liquid?

It decreases solubility Signup and view all the answers

What happens when Gibbs Free Energy ($ abla G$) is less than zero?

The process is spontaneous Signup and view all the answers

In which scenario would increasing temperature increase the solubility of a solid solute?

When the reaction is endothermic Signup and view all the answers

What do Lewis acids and bases specifically involve in their interactions?

Electron donation and acceptance Signup and view all the answers

What does a catalyst do in a chemical reaction?

Speeds up the reaction or lowers activation energy Signup and view all the answers

What is indicated by a pH level greater than 7?

Basic solution Signup and view all the answers

What effect does increasing pressure have on a gas system according to gas laws?

Increasing pressure decreases the number of moles of gas. Signup and view all the answers

Which principle states that a system will adjust to minimize stress applied to an equilibrium?

Le Chatelier’s Principle Signup and view all the answers

Which of the following is true regarding the law of mass action?

The rate of reaction is proportional to the concentration of the reactants. Signup and view all the answers

In an endothermic reaction, where does the stress apply primarily in terms of temperature?

Shifts the equilibrium toward the products when heat is added. Signup and view all the answers

What is the result of adding more reactants to a chemical equilibrium according to Le Chatelier’s Principle?

The equilibrium shifts towards the products. Signup and view all the answers