Understanding Chemical Concepts Matching

This question requires matching chemical concepts from List-I with their correct descriptions or examples from List-II. Let's break down each match:

Ambident Nucleophiles

Ambident nucleophiles are species that possess two or more different atoms capable of donating a pair of electrons to form a new covalent bond. This means they can attack an electrophilic center from different sites.

• The cyanide ion ($CN^-$) can attack via the carbon atom or the nitrogen atom.
• The nitrite ion ($NO_2^-$) can attack via the nitrogen atom or an oxygen atom.

Therefore, (A) Ambident nucleophiles correctly matches with (III) Cyanides and nitrites.

Plane Polarized Light

Plane polarized light is light in which all of the light waves vibrate in the same plane. The device commonly used to produce or analyze plane polarized light is the Nicol prism.

• A Nicol prism is an optical component made by cementing two pieces of calcite crystal together with Canada balsam.
• It separates an unpolarized beam of light into two plane-polarized beams that are polarized at right angles to each other.

Thus, (B) Plane polarized light is associated with (IV) Nicol Prism.

Superimposable Mirror Image

A molecule or object that is identical to its mirror image, meaning it can be perfectly aligned with its mirror image, is described as having a superimposable mirror image.

• Such objects are achiral.
• They are often referred to as being symmetrical.

Therefore, a (C) Superimposable mirror image relates to a (I) Symmetrical object.

$\beta$-Elimination Reaction

A $\beta$-elimination reaction is a type of elimination reaction where atoms on two adjacent carbon atoms are removed. Typically, a hydrogen atom is removed from the $\beta$-carbon and a leaving group from the $\alpha$-carbon.

• Saytzeff's rule (or Zaitsev's rule) is a principle that predicts the outcome of elimination reactions. It states that the most substituted alkene (the one with the most alkyl groups attached to the double bond carbons) is usually the major product in a $\beta$-elimination reaction.

Consequently, (D) $\beta$-elimination reaction is correctly matched with (II) Saytzeff rule.

Correct Option Identification

Based on the explanations above, the correct matching is:

• (A) - (III)
• (B) - (IV)
• (C) - (I)
• (D) - (II)

This corresponds to Option 1.