NEET Chemistry 5

Question 1

Which of the following reagents converts a primary alcohol to an aldehyde without further oxidation to a carboxylic acid?

Accepted Answer

PCC (pyridinium chlorochromate)

Answer

PCC (pyridinium chlorochromate) is a mild oxidizing agent that oxidizes primary alcohols to aldehydes and stops there without forming carboxylic acids.

Question 2

The crystal field splitting energy (Δo) is largest for which of the following ligands?

Accepted Answer

CN⁻

Answer

CN⁻ is a strong-field ligand at the top of the spectrochemical series, producing the largest crystal field splitting energy Δo.

Question 3

In electrolysis of dilute H₂SO₄ solution, what is produced at the anode?

Accepted Answer

Oxygen gas

Answer

At the anode, water is oxidized (2H₂O → O₂ + 4H⁺ + 4e⁻) in dilute H₂SO₄ because O₂ is discharged in preference to SO₄²⁻.

Question 4

Nylon-6 is produced by the polymerization of:

Accepted Answer

Caprolactam

Answer

Nylon-6 is produced by the ring-opening polymerization of caprolactam (a cyclic amide with 6 carbon atoms).

Question 5

Which of the following is the correct IUPAC name for [Co(NH₃)₄Cl₂]Cl?

Accepted Answer

Tetraamminedichlorocobalt(III) chloride

Answer

In IUPAC nomenclature for coordination compounds, ligands are listed alphabetically (ammine before chloro), followed by the metal and its oxidation state, then the outer sphere ion.

NEET - National Eligibility cum Entrance Test Practice Test

NEET - National Eligibility cum Entrance Test Practice Test

NEET Chemistry 5