Explanation

The oil in the wick of an oil lamp rises up due to capillary action.

This effect is due to surface tension of liquids.

The wick here acts as a capillary tube

Explanation

The weight of an object is minimum when it is placed at the center of the earth because when an object is in the center, experiences gravitational pull from all directions & the weight of an object maximum on earth is on the poles

Explanation

Solids are packed together tighter than liquids and gases, hence sound travels fastest in solids

Sound can not travel through vaccum 

Explanation

Potassium permanganate is an inorganic chemical compound and it is a strong oxidizing agent

Explanation

There are Two types of vitamins

1. Water soluble

2. Fat soluble

Explanation

The retina is a thin layer of tissue that lines the back of the eye on the inside.

It is located near the optic nerve.

The purpose of the retina is to receive light that the lens has focused,

convert the light into neural signals,

and send these signals on to the brain for visual recognition

Explanation

• Mercury is the only stable elemental metal that is liquid at standard room temperature
• Symbol and Number: Mercury has the chemical symbol Hg and atomic number 80.
• Freezing Point: It melts at -38.8°C (-37.9°F)

Explanation

Light Year is the distance that light can travel in one year.

The distance light travels in one year is known as light year.

Explanation

The stratospheric ozone layer is Earth's “sunscreen”  protecting living things from too much ultraviolet radiation from the sun.

Oxygen layer in the atmosphere

Ozone protects us from the harmful ultraviolet radiation of the sun.

Ozone formula: O3

The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere.

The ozone layer is depleting: Air pollution

ND17-7-2023

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Explanation

The molecules are most tightly packed in solid state because of the strong intermolecular forces of attraction.