NEET Chemistry: Matter and its nature Practice Questions

Correct answer: C — Gas

In the gaseous state, particles move randomly and far apart, resulting in the weakest intermolecular forces compared to the ordered arrangement in solids and liquids.

Correct answer: D — Kilogram per cubic meter (kg/m³)

Density is defined as mass per unit volume. The SI unit for mass is kg, and for volume is m³, so the unit for density is kg/m³.

Correct answer: A — The mixture has uniform composition throughout the entire volume.

A homogeneous mixture (like salt dissolved in water) has a uniform composition throughout. In contrast, a heterogeneous mixture has non-uniform composition.

Correct answer: D — Energy

Matter is defined by having mass, occupying space (volume), and possessing energy. While mass and energy are fundamental, 'color' is a property often related to interaction with light, not a fundamental characteristic defining the substance itself in this context.

Correct answer: D — London Dispersion Forces

London Dispersion Forces are the weakest type of intermolecular force, arising from temporary fluctuations in electron distribution.

Correct answer: D — Density of the liquids

Immiscibility and layer formation in immiscible liquids are dictated by their relative densities.

Correct answer: D — Intensive property

Intensive properties are those that are independent of the amount of substance (e.g., temperature, density). Extensive properties depend on the amount of matter (e.g., mass, volume).

Correct answer: A — Density and Boiling Point

Physical properties (like density, boiling point, shape) can be observed without changing the chemical composition of the substance. Chemical reactions involve changes in composition.

Correct answer: D — Change in the state or form of the substance without chemical change

A physical change involves alterations in the form or state of matter (like phase change) but does not result in the formation of new chemical substances.

Correct answer: C — Density of water

Intensive properties are independent of the amount of matter present (e.g., density). Mass and volume are extensive; total energy is extensive.

Correct answer: B — Indefinite in size and shape

Matter is characterized by having indefinite size and shape; it takes the shape of its container, meaning it is generally indefinite in size and shape.

Correct answer: B — Matter is the result of the interaction of forces between particles, which possess mass and occupy space.

Matter is fundamentally defined as anything that occupies space and has mass. This mass is due to the interactions and motion of the constituent particles (atoms and molecules).

Correct answer: B — They have a fixed shape and a fixed volume.

Solids possess both a fixed shape (definite outer boundaries) and a fixed volume.

Correct answer: D — Diffusion

The random motion of particles is the basis for diffusion, where particles spread out from a region of higher concentration to lower concentration.

Correct answer: B — The composition is uniform throughout

A homogeneous mixture is one where the composition is uniform throughout the entire volume, meaning the components are evenly distributed.