EASY
7th ICSE
IMPORTANT
Earn 100

The reddish-brown coating formed on iron objects is called .

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Important Questions on Air and Atmosphere

EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 8 - Air and Atmosphere>EVALUATION>Q 6
_____ causes brain damage, digestive irregularities and even cancer. (Carbon dioxide/ Oxygen/ Lead)
EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 8 - Air and Atmosphere>EVALUATION>Q 1
Air contains water vapour.
MEDIUM
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 8 - Air and Atmosphere>EVALUATION>Q 2
Reactions of metals and non-metals with oxygen are called oxidation reactions.
MEDIUM
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 8 - Air and Atmosphere>EVALUATION>Q 3
Carbon dioxide is one of the oxides responsible for causing acid rain.
MEDIUM
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 8 - Air and Atmosphere>EVALUATION>Q 4
Combustion is a natural process.
EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 8 - Air and Atmosphere>EVALUATION>Q 5
Smog is a mixture of smoke and fog.
MEDIUM
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 8 - Air and Atmosphere>EVALUATION>Q 1

Write two uses of nitrogen.

MEDIUM
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 8 - Air and Atmosphere>EVALUATION>Q 1
Write two uses of Oxygen.