Why is solid carbon dioxide known as dry ice? 

Important Questions on Matter in Our Surroundings

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Very Short Answer Type Questions>Q 20

State one condition necessary to liquefy gases (other than applying high pressure). 

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Very Short Answer Type Questions>Q 21

Solid carbon dioxide is stored under low pressure. 

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Very Short Answer Type Questions>Q 22

What is the chemical name of dry ice? (Calcium oxide/Carbon dioxide)

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Very Short Answer Type Questions>Q 23

When steam condenses to form water, heat is _____. (absorbed/released)

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Very Short Answer Type Questions>Q 23

The temperature on the Kelvin scale = Temperature on the Celsius scale $+$ _____ (Choose from $273 / 373$).

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Very Short Answer Type Questions>Q 23

The state of matter called _____ makes a fluorescent tube (or neon sign bulb) to glow. (Solid/ Liquid / Gas / Plasma)

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 24

What do you understand by the term ‘latent heat’? What are the two types of latent heat?

MEDIUM

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 1 - Matter in Our Surroundings>Short Answer Type Questions>Q 25

Why is heat energy needed to melt a solid? What is this heat energy called?