Characteristics of air – Spot the...

The video tutorial discusses various elements and molecules, highlighting that oxygen, carbon dioxide, nitrogen, and helium are molecules found in air, while iron and sodium are not.

Which of the following elements was mentioned first in the video?

• Helium

• Carbon dioxide

• Iron

• Oxygen

Which of these is a molecule found in the air?

• Oxygen

• Iron

• Sodium

• Gold

Which of the following is NOT a molecule found in the air?

• Nitrogen

• Sodium

• Helium

• Carbon dioxide

What is common among oxygen, carbon dioxide, nitrogen, and helium?

• They are all metals.

• They are all found in the air.

• They are all liquids.

• They are all found in water.

Which of these elements is not mentioned as being in the air?

• Iron

• Helium

• Carbon dioxide

• Nitrogen