What are the components of air?

Important Questions on Air and the Atmosphere

EASY

7th ICSE

IMPORTANT

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

Why is air called a mixture?

EASY

7th ICSE

IMPORTANT

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

What is needed to start combustion?

EASY

7th ICSE

IMPORTANT

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

Describe the reactions of one metal and one non-metal with oxygen.

EASY

7th ICSE

IMPORTANT

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

Briefly describe a test for carbon dioxide in two to three sentences.

EASY

7th ICSE

IMPORTANT

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

Why does a burning candle go out when a glass is inverted over it and left for some time?

EASY

7th ICSE

IMPORTANT

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

Why is liquid nitrogen convenient for cooling foods?

EASY

7th ICSE

IMPORTANT

Inspired Chemistry-7>Chapter 7 - Air and the Atmosphere>CHECKPOINT>Q 8

What is dry ice? How is it used?

EASY

7th ICSE

IMPORTANT

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

Which gas is used up during photosynthesis?