Air and the Atmosphere First Round Quiz

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Combustion provides heat for many industrial processes and accounts for over how much percent of the power used to generate electricity?

90%

50%

80%

60%

What are the changes observed in the copper sulphate, when we light the candle?(Aparna's experiment)

It changes its colour to blue

It changes its colour to greenish-yellow

It gets hydrated

It turns blue and gets hydrated

What are the products formed by combustion

Oxygen and Carbon Dioxide

Carbon Dioxide

Water and Carbon Dioxide

Oxygen and water

Why does the candle flame finally go off in Janani's experiment?

It doesn't receive water vapour

It doesn't receive fresh air to burn

The flame gets blown when it's covered with the glass

It doesn't receive all of these

What is the meaning of wick?

A lamp

To absorb a liquid

A stovetop

To remove a liquid

Antoine Lavoisier discovered that the products of burned sulfur or phosphorus ______ the initial substances in 1772.

Overweighed

Overweighted

Outweighted

Outweighed

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