Explanation

Electric current is the flow of negative charges called electrons.

Its SI unit is Ampere (A)

Explanation

In an isothermal process, the temperature of the system remains constant throughout.

Since this expansion occurs at a constant temperature, the internal energy is not changed (for an ideal gas, internal energy is dependent only on temperature).

The work done by the gas during expansion is not zero, and as the gas expands, the pressure decreases.

Explanation

When a police car with its siren on moves towards a stationary listener, the frequency of the sound perceived by the listener increases.

This phenomenon is known as the Doppler effect.

Explanation

Explanation

After muscle contraction, calcium is pumped back into the sarcoplasmic reticulum for muscle recovery.

Explanation

In sp² hybridization, the unhybridized p orbital remains perpendicular to the plane formed by the sp² hybridized orbitals, contributing to the formation of a π bond.

Explanation

Globular proteins are not abundantly found in hair.

Instead, fibrous proteins like keratin are found in hair.

Globular proteins are spherical in shape, have polypeptide chains, and are typically soluble in water.

Explanation

Boric acid on heating at 100oC gives HBO2.

On heating orthoboric acid (H3BO3) at 370 K or above,

It changes to metaboric acid (HBO2).

On further heating, this yields boric oxide B2O3.

Additional information:

Orthoboric acid, $H_{3}B{O}_3$ is a white crystalline solid, with soapy touch.

It is sparingly soluble in water but highly soluble in hot water.

Explanation

Explanation

The standard deviation is a measure of the dispersion or spread of a set of data points.

It is independent of changes in both the origin (the mean or average value) and the scale (the units of measurement).