Which of the following is true regarding CO₂ ?

Correct option is D

The correct answer is (d) The solid form of CO₂ is called dry ice.
· Carbon dioxide (CO₂) is a colorless and odorless gas at room temperature.
· When solidified, it is known as dry ice, which sublimates directly into gas without passing through a liquid phase. Dry ice is commonly used as a cooling agent.
The other options are incorrect for the following reasons:
· CO₂ is indeed soluble in water, ethanol, and acetone to some extent, forming carbonic acid when dissolved in water.
· CO₂ is a linear covalent molecule, not an electrovalent (ionic) one. It has two double bonds with oxygen atoms and no net dipole moment.
· CO₂ is a colorless and odorless gas, not white or foggy with a pungent smell.
Additional Information:
· CO₂ solubility: CO₂ is more soluble in cold water than warm water, which is why carbonated beverages retain their fizz better when cold.
· Linear molecule: CO₂ has a bond angle of 180°, making it a non-polar molecule.
· Dry ice: Used for refrigeration in the food industry and for creating special fog effects in entertainment.
· Other gases: Unlike CO₂, some gases like ammonia (NH₃) have a pungent smell.