Question

Chlorine is a greenish yellow gas.
A. True
B. False

Answer 1

Hint: Chlorine is called a halogen and belongs to p-block in the periodic table. As we are moving from top to bottom in the periodic table the boiling point of the elements increases due to the enhancement of Van der Waals force of attraction.

Complete answer:
- Halogens belong to group VII A in the periodic table.
- Halogens show a smooth variation in the physical properties as we are moving from top to bottom along the group in the periodic table.
- The physical state chlorine at room temperature and pressure is gaseous.
- All the halogens are colored due to the absorption of light from the visible region.
- The color of chlorine gas is greenish yellow.
- The physical state of the halogens is going to depend on the Van der Waals force of attraction between the molecules of the halogens.
- Therefore the color of the chlorine gas is greenish yellow. Then the given statement is true.

So, the correct option is A.

Note:
All halogens are non-metals means they won’t lose electrons. The Van der Waals force of attraction is very less in case of chlorine that is why chlorine is a gas at room temperature and the Van der Waals force of attraction increases along the group and the physical state of the remaining halogens are going to change like bromine is liquid at room temperature and iodine is solid at room temperature.