What is dry ice? How is it used?

Important Questions on Air and the Atmosphere

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>CHECKPOINT>Q 9

Which gas is used up during photosynthesis?

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>CHECKPOINT>Q 1

What are the ways in which oxygen is prepared in the laboratory?

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>CHECKPOINT>Q 2

How will you show that mass change takes place on combustion?

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>CHECKPOINT>Q 3

Write equations for reactions of potassium, magnesium and phosphorus with oxygen.

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>CHECKPOINT>Q 4

Mention some uses of nitrogen.

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>CHECKPOINT>Q 5

Explain the nitrogen cycle.

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>CHECKPOINT>Q 6

With the help of a diagram, describe how the balance between oxygen and carbon dioxide is maintained.

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>Stop and Check>Q 1

A substance that contaminates air is called a pollutant.