Match List I with List II:

Choose the correct answer from the options given below:

A-ii, B-iii, C-iv, D-i

The correct answer is option 1. A-ii, B-iii, C-iv, D-i.

Let us look at each of the given reagents:

A. Bayer's reagent: ii. \(MnO_4^-\):

Baeyer’s reagent is a cold potassium permanganate alkaline solution \((KMnO_4)\). It’s a strong oxidising agent that’s utilised in qualitative organic analysis to check for unsaturation. When this solution reacts with an unsaturated chemical (such as an alkene or alkyne), the colour changes from pinkish-purple to brown.

The alkene is reduced to manganese dioxide while the permanganate is oxidised to 1,2-diol \((MnO_2)\) Because the reaction does not affect alkanes or aromatic compounds, it can be used to separate them from alkenes and alkynes.

B. Tollen's Reagent: iii. \(Ag^+\):

Tollen's Reagent is a chemical reagent used to test for the presence of aldehydes. It is an aqueous solution of silver nitrate (AgNO\(_3\)) mixed with ammonia (NH\(_3\)). The active component of Tollen's Reagent is the diamminesilver(I) complex, \([Ag(NH_3)_2]^+\). The silver ion (Ag\(^+\)) in Tollen's Reagent plays a crucial role in the oxidation of aldehydes to carboxylic acids. When an aldehyde is present, it reduces the Ag\(^+\) ion to metallic silver (Ag\(^0\)). This reduction reaction results in the formation of a silver mirror on the inner surface of the reaction vessel, indicating a positive test for aldehydes. Ketones, however, do not react with Tollen's Reagent, and no silver mirror is formed.

C. Lindlar's Catalyst: iv. \(Pd\):

Lindlar's catalyst is a heterogeneous catalyst that consists of palladium (Pd) deposited on calcium carbonate (CaCO\(_3\)), which is then poisoned with lead acetate and quinoline. It is specifically used for the hydrogenation of alkynes to alkenes, stopping at the alkene stage without further hydrogenation to alkanes. The palladium (Pd) in Lindlar's catalyst facilitates the partial hydrogenation of alkynes to cis-alkenes. The poisoning agents (lead acetate and quinoline) deactivate some of the palladium sites, preventing the over-hydrogenation of the alkene to an alkane and ensuring the selective formation of the desired alkene.

D. Metal assocoiated with ozonolysis: i. \(Zn\):

In ozonolysis, zinc (Zn) is commonly used in the work-up step to reduce the ozonide intermediates to carbonyl compounds (aldehydes, ketones, or carboxylic acids) and prevent the formation of unwanted side products. After the ozonolysis reaction, where ozone (O\(_3\)) cleaves the carbon-carbon double bonds of alkenes, the reaction mixture is often treated with a reducing agent like zinc in the presence of water \((Zn/H_2O)\) to decompose the ozonides safely and yield the desired carbonyl compounds.