Explanation

• The general formula for alkanes is CnH2n+2, where n is the number of carbon atoms in the molecule.
• This formula represents the saturated hydrocarbons, also known as paraffins.

Key Points:

• CnH2n is the general formula for alkenes
• CnH2n+1 is the general formula for alcohols

Explanation

Diamond and graphite are two allotropes of carbon:

As allotropes, they are different structural forms of the same element, carbon, which exhibit distinct physical properties due to their unique atomic arrangements

Explanation

The power of the lens is the reciprocal of focal length.

The SI unit is dioptre.

Dioptre (D)

Power of lens = 1/ focal length in meter.

Explanation

Explanation

• MirpurKhas is known for its mango cultivation.
• It is also called the “City of Mangoes”.
• It has been home to an annual mango festival Pakistan since 1955.

Explanation

• A plane mirror produces an image that is the same size as the object.
• The mirror doesn't magnify or reduce the image, it simply reflects it.

Explanation

Evaporation is the process where liquid turns into gas at temperatures below its boiling point.

It occurs at the surface of the liquid.

It is influenced by factors like temperature and surface area.

Explanation

Liquids take the shape of their container, meaning they have no definite shape, but they maintain a constant volume regardless of the container they are in. 

Explanation

The unit of angular acceleration is radians per second squared (rad/s²).

This unit measures the rate at which an object's angular velocity (its rate of rotation) changes over time. 

Radians (rad): Represents an angle.

Seconds (s): Represents time. 

Explanation

hot is burn

similarly cold is to freeze