Test for gases in air — task. Science State Board, Class 6.

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Read the statement and select the correct answer:

Charollete conducted a simple experiment on rusting reaction with a wet iron wool and found that the total percentage of
Statement 1: Nitrogen is around

$20\%$ .
Statement 2: Carbon-di-oxide is around

$20\%$ .

Both the statement 1 and 2 is correct
Both the statement 1 and 2 are wrong
Only statement 1 is correct
Only statement 2 is correct

Statement 1: Air is mainly composed of hydrogen and oxygen.
Statement 2: Air is composed of nitrogen and oxygen only.

Only statement 1 is correct
Both the statement 1 and 2 is correct
Only statement 2 is correct
Both the statement 1 and 2 are wrong

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13. Test for gases in air

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