Explanation

The septum is the muscular wall that separates the right and left sides of the human heart.

It prevents the mixing of oxygenated and deoxygenated blood between the two sides.

Explanation

In irregular (diffused) reflection, light rays hit a rough surface.

This causes them to reflect in different directions and angles.

Explanation

Copper is a good conductor of heat.

That's why it’s used in cooking utensils and electrical wiring.

Wood, plastic, and glass are poor conductors (insulators), meaning they do not transfer heat easily.

Explanation

When acids react with carbonates, they produce carbon dioxide gas, water, and a salt.

For example:

2HCl + Na2CO3 → 2NaCl + H2O + CO2.

Explanation

An electric field is the region around a charged particle where it exerts a force on other charges.

It is represented by field lines.

It is measured in newtons per coulomb (N/C).

Explanation

The first law of reflection states that the angle of incidence = angle of reflection.

Both rays and the normal lie in the same plane.

Explanation

The charges of Proton, Electron, Neutron respectively are:

• Proton: Positive charge (+1)
• Electron: Negative charge (-1)
• Neutron: Neutral charge (0)

Explanation

RBCs lack a nucleus to make more room for hemoglobin, which carries oxygen.

This structure helps them efficiently transport oxygen throughout the body.

Explanation

When white light passes through a prism, it is refracted, or bent, and split into its individual colors, a process known as dispersion.

The order of deviation is:

• Violet (most deviated)
• Blue
• Green
• Yellow
• Red (least deviated)

Explanation

Carbohydrates are the body’s primary and quickest source of energy, especially glucose.

They are broken down during cellular respiration to release ATP (energy).