Name the process associated with the following Dry ice is kept at room temperature and at one atmospheric pressure.

Name the process associated with the following

Dry ice is kept at room temperature and at one atmospheric pressure.

Short/Brief Note

Sublimation of dry ice (solid) to C0₂ (gas)

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Pure Substances

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Chapter 2: Is Matter Around Us Pure - Short Answer Questions [Page 15]

Chapter 2 Is Matter Around Us Pure
Short Answer Questions | Q 20. (a) | Page 15

Air is a pure substance.

Give the main difference between a pure substance and an impure substance.

______ has the same properties throughout the sample.

We mix rice, dal, salt, chilies, pepper, ghee, and other ingredients to make Pongal. So Pongal is also a ______.

A ______ substance is made up of only one kind of particle.

Complete the Analogy.

Made up of one kind of particles: Pure substance:: Chemical combination of two or more element: ______.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.

A substance must absorb ______ so that it can melt.

How are pure substances classified?

What are the characteristics of Pure Substances? (or) List out the characteristics of Pure Substances.