Explanation

Natural rubber is classified as an elastomer, a type of polymer that can stretch and return to its original shape.

Elastomers are known for their elasticity and flexibility, making rubber ideal for tires, seals, and gloves.

Explanation

Explanation

Hydrogen bonding occurs when hydrogen is bonded to highly electronegative atoms like fluorine, oxygen, or nitrogen.

HCl does not form hydrogen bonds because chlorine is not electronegative enough to form such interactions with hydrogen.

Explanation

Carbon monoxide (CO) is a poisonous gas that is emitted from the engine of an automobile.

The smoke released from the automobile is due to the combustion of fuels like petrol and diesel.

Explanation

Liquids have smaller intermolecular spaces compared to gases, allowing particles to be more tightly packed.

This closeness results in a higher density in liquids than in gases.

Explanation

When calcium carbonate (CaCO₃) reacts with dilute hydrochloric acid (HCl), it produces carbon dioxide (CO₂) gas.

The reaction is:

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O

Explanation

Gases fill all the space available to them by expanding to take the shape and volume of their container.

Unlike solids and liquids, gases have no fixed shape or volume.

Explanation

Gas molecules have very weak forces of attraction already, so breaking them does not require much energy.

Thus, "Less energy is required..." is NOT a unique characteristic describing their general behavior compared to solids or liquids.

Explanation

Aluminium has a valency of 3 because it loses three electrons to achieve a stable electron configuration.

Its atomic number is 13.

Its electron configuration is 2, 8, 3.

This means it donates three electrons to form Al³⁺ ions.

Explanation