[Cr(en)3]3+ shows optical isomerism because it has chiral centers due to the bidentate nature of the ethylenediamine (en) ligands.

Coordination isomerism occurs when the composition of the coordination sphere differs, as seen in this complex.

The Freundlich equation describes a type of adsorption isotherm that is applicable to heterogeneous surfaces.

Pivot joints allow for rotational movement, as seen in the neck.

Ball-and-socket joints, such as the shoulder and hip joints, allow for the greatest range of motion.

The elbow is a hinge joint, allowing movement in one plane, primarily flexion and extension.

The shoulder joint is a ball and socket joint, allowing for a wide range of motion.

The shoulder and hip joints are ball and socket joints, allowing for a wide range of motion.

The shoulder joint is a ball and socket joint, allowing for a wide range of motion.

The knee joint is classified as a hinge joint, allowing movement primarily in one plane.

A p-n junction is formed when p-type and n-type semiconductors are joined together.

A U-shaped valley is formed by the erosion of rock by glaciers, which carve out the valley's characteristic shape.

In opposite leaf arrangement, two leaves grow at each node directly across from each other.

In opposite leaf arrangement, two leaves grow at each node directly across from each other.

A convex lens is used to correct hypermetropia (farsightedness) as it converges light rays before they enter the eye.

Hyperopia is corrected using a convex lens, which converges light rays before they enter the eye, allowing for clear vision of nearby objects.

A convex lens is used to correct hyperopia (farsightedness) as it converges light rays before they enter the eye.

Linearly polarized light consists of waves that oscillate in a single plane, making it completely polarized.

Lasers emit light that is completely polarized because the light waves are emitted in a single direction and phase.

Cellulose is a carbohydrate and a major component of plant cell walls.

A Topographic Map shows physical features of the Earth, including mountains, valleys, and plains.

A Topographic Map shows the physical features of an area, including mountains, valleys, and plains.

An identity matrix is defined as a square matrix with all diagonal elements equal to 1 and all other elements equal to 0.

A matrix where all elements are zero is called a zero matrix.

A scalar matrix is a square matrix in which all the elements are equal to the same scalar value.

A skew-symmetric matrix is defined by the property A = -A.

The reaction of 2-bromopropane with a strong nucleophile typically follows the SN2 mechanism due to steric hindrance.

The reaction of haloalkanes with strong nucleophiles typically follows the SN2 mechanism, which involves a single concerted step.

Tertiary haloalkanes typically undergo the SN1 mechanism, which involves the formation of a carbocation intermediate.

Learning a new language primarily involves semantic memory for vocabulary and grammar.