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FAQs on Chapter 1: Matter and Its Composition, Class 7 Chemistry ICSE

1. What is matter and its composition?
Ans. Matter refers to anything that occupies space and has mass. It can exist in three states, solid, liquid, and gas. Matter is composed of particles, atoms, and molecules. The composition of matter refers to the different elements that make up the matter, and how they are arranged.
2. What are the types of matter?
Ans. Matter can exist in three states, solid, liquid, and gas. Solids have a fixed shape and volume, liquids have a fixed volume but no fixed shape, and gases have neither a fixed shape nor volume. Matter can also be classified as a pure substance or a mixture. Pure substances are made up of only one type of particle, while mixtures are made up of two or more types of particles.
3. What is the difference between an element and a compound?
Ans. An element is a pure substance made up of only one type of atom, while a compound is made up of two or more different types of atoms chemically bonded together. Elements cannot be broken down into simpler substances by chemical means, while compounds can be broken down into their constituent elements by chemical means.
4. What is a mixture?
Ans. A mixture is a combination of two or more different types of particles that are not chemically bonded together. Mixtures can be either homogeneous or heterogeneous. Homogeneous mixtures have a uniform composition throughout, while heterogeneous mixtures have a non-uniform composition.
5. Why is it important to understand matter and its composition?
Ans. Understanding matter and its composition is important because it helps us understand the properties and behavior of different substances. It also helps us understand how substances can be transformed and used in various applications. Understanding matter and its composition is essential in fields such as chemistry, physics, and materials science.
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