Light is a form of electromagnetic waves and electromagnetic waves are a type of energy. We can see light almost everywhere. Light is produced and taken in by tiny packets also known as photons and correspondingly, it exhibits properties of waves and particles.

The nucleus of plant cells is usually of a round or elliptic appearance, sometimes it is also shaped like a spindle.

The first part of a plant to grow is the root like a straw, transports water through plant raises the height of flowers and leaves and brings closer to light. Leaves and flowers also grow.

Electric charge comes in two types- positive and negative. Two positively charged substances, or objects, experience a mutual repulsive force, as do two negatively charged objects. Positively charged objects and negatively charged objects experience an attractive force. The SI unit of electric charge is the coulomb.

Fractional distillation columns for mixed solvent separation with high purity results-up to 99.5 percent minimum purity for selected products and a water content of under 500 parts per million.

Sodium nitrate is the chemical compound with the formula NaNO₃.

Nasal passage in the nose is present behind the nostrils.

Biogas comprises primarily methane (CH₄) and carbon dioxide (CO₂) and may have small amounts of hydrogen sulphide (H₂S), moisture and siloxanes. The major component out of all of them is methane.

None of the given acids is stored in metal containers.

Abundance earth's crust: 200 parts per million by weight.

Aniline dyes are considered synthetic organic compounds, a carbon-based chemical is used as a dye.