Explanation

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

CNG and Sui Gas have the same composition, primarily methane (CH₄).

Both are used as fuel for heating and vehicles.

It is used as a cleaner alternative to petrol and diesel in vehicles.

Explanation

Explanation

Explanation

Evaporation happens when a liquid turns into a gas.

It can be easily visualized when rain puddles “disappear” on a hot day or when wet clothes dry in the sun.

In these examples, the liquid water is not actually vanishing—it is evaporating into a gas, called water vapor.

Explanation

Magma that is low in silica and high in iron and magnesium is mafic magma.

Mafic magma is also known as basaltic magma

Silica content: Mafic magma has a silica content of roughly 50%. 

Mafic magma contains dark-colored minerals, such as olivine and pyroxene,

Explanation

Explanation

Black gold is a liquid based term applied to oil or petroleum.

It comes in black color when it comes out of the ground.

It is worth a great deal of money. Petroleum is black gold.

Coal is black diamond.

Explanation

NaCl is an electrolyte.

Because it dissociates into ions (Na+ and Cl-) in water, conducting electricity.