Question

Statement 1: Ammonia is a brown coloured odourless gas.
Statement 2: Ammonia floats above air due to its less density.

• A. Statement (2) is correct and (1) is incorrect.
• B. Statement (1) is correct and (2) is incorrect.
• C. Both Statement (1) and (2) are correct.
• D. Both Statement (1) and (2) are incorrect.

Answer 1

The correct option is A Statement (2) is correct and (1) is incorrect.

The chemical formula of ammonia is ${\mathrm{NH}}_3$. Following are the physical properties of ammonia:

• Odour: very pungent odour.

• Colour: colourless

• Taste: bitter.

• Density: density of ammonia is around 0.75 $\mathrm{kg}/m^3$, which is lighter than air(0.58 times the density of air).

• Toxicity: Non-toxic in small doses but in large doses, it is toxic and might lead to organ failures.

• Solubility: Highly soluble in water and gives an aqueous solution of ammonium hydroxide.

• Boiling point: At - 33.5°C, ammonia evaporates into a gas.

• Melting point: -77.78°C

• Nature: ammonia is basic in nature.