EASY
7th ICSE
IMPORTANT
Earn 100

Give word equation for the reactions of Calcium with oxygen.

Important Questions on Air & Atmosphere

EASY
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 7 - Air & Atmosphere>EXERCISE>Q 17
Give word equation for the reactions of Magnesium with oxygen.
MEDIUM
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 7 - Air & Atmosphere>EXERCISE>Q 18

Distinguish between combustion & respiration with suitable word equations only.

MEDIUM
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 7 - Air & Atmosphere>EXERCISE>Q 18
Distinguish between combustion and rusting with suitable word equations only.
HARD
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 7 - Air & Atmosphere>EXERCISE>Q 19

Give the main experimental points only to demonstrate that magnesium gains weight on burning.

HARD
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 7 - Air & Atmosphere>EXERCISE>Q 19
Give the main experimental points only to demonstrate that Candle gains weight on burning.
EASY
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 7 - Air & Atmosphere>EXERCISE>Q 20

Give reasons for the following: Patients suffering from lung problems are kept in an oxygen tent.

EASY
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 7 - Air & Atmosphere>EXERCISE>Q 20

Give reasons for the following:

Oxygen finds utility in welding & cutting of metals.

HARD
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 7 - Air & Atmosphere>OBJECTIVE TYPE QUESTIONS>Q 1

Match the following.

List I List II
1. The constituent of air which is around 0.02%. A. Nitrogen
2. The constituent of air which is inert or unreactive. B. Oxygen
3. The constituent of air which is non-combustible, but supports combustion. C. Sulphur dioxide
4. A pollutant in air responsible for acid rain. D. Carbon dioxide
 
5. The main rare gas present in air. E. Argon