Q.80 Chemistry ⭐ 360° Option Elimination Active

NEET 2025 Chemistry Question 80 Solution

Topic: The d- and f-Block Elements & Coordination Compounds · Official NTA Booklet Code 45

Question

Match List - I with List - II. List I: A. Haber process; B. Wacker oxidation; C. Wilkinson catalyst; D. Ziegler catalyst. List II: I. Fe catalyst; II. PdCl₂; III. [(PPh₃)₃RhCl]; IV. TiCl₄ with Al(CH₃)₃. Choose the correct answer from the options given below:

✓

Verified Against NTA Final Answer Key

Option (3) : A-I, B-II, C-III, D-IV

📚 The d- and f-Block Elements & Coordination Compounds Easy

📋 Given Parameters & Problem Setup

List I (Processes/Catalysts) A. Haber process, B. Wacker oxidation, C. Wilkinson catalyst, D. Ziegler catalyst

List II (Catalyst Formulations) I. Fe catalyst, II. PdCl₂, III. [(PPh₃)₃RhCl], IV. TiCl₄ with Al(CH₃)₃

⚡

The 30-Second Exam Hall Shortcut: ⚡ Named Catalysts 1-to-1 Sequence Match

⏱️ Save ~30 seconds

Haber = Fe (A-I). Wacker oxidation = PdCl₂ (B-II). Wilkinson = Rh complex [(PPh₃)₃RhCl] (C-III). Ziegler-Natta = TiCl₄ + AlR₃ (D-IV)! Perfect sequential match: A-I, B-II, C-III, D-IV!

1 A. Haber process: Industrial synthesis of ammonia (N₂ + 3H₂ ⇌ 2NH₃) uses Iron (Fe) catalyst with K₂O/Al₂O₃ promoter ⟹ A matches I.

2 B. Wacker process: Oxidation of ethene to ethanal (acetaldehyde) uses Palladium chloride (PdCl₂) with CuCl₂ ⟹ B matches II.

3 C. Wilkinson’s catalyst: Homogeneous hydrogenation of alkenes uses chloridotris(triphenylphosphine)rhodium(I), [(PPh₃)₃RhCl] ⟹ C matches III.

4 D. Ziegler-Natta catalyst: Coordination polymerization of alkenes uses Titanium tetrachloride (TiCl₄) with trialkylaluminium (Al(CH₃)₃ or Al(C₂H₅)₃) ⟹ D matches IV.

5 Sequential match: A-I, B-II, C-III, D-IV.

6 Select Option (3) in under 10 seconds!

🛡️

Why You Can 100% Trust This Shortcut: Variable Oxidation States & Catalytic Mechanisms of Transition Elements (NCERT Chemistry · d- and f-Block Elements).

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Match Haber Process and Wacker Oxidation

Examine transition metal catalysts in major industrial processes from NCERT Chapter 8:

\text{Haber Process: } \text{N}_2 + 3\text{H}_2 \xrightarrow{\text{Fe catalyst}, \text{Mo/K}_2\text{O}} 2\text{NH}_3 \implies \text{A matches I}

• A matches I (A-I).
• Wacker Oxidation: Conversion of ethene into ethanal using aqueous PdCl₂ catalyst in the presence of CuCl₂ and air:
• \text{C}_2\text{H}_4 + \text{PdCl}_2 + \text{H}_2\text{O} \longrightarrow \text{CH}_3\text{CHO} + \text{Pd} + 2\text{HCl} \implies \text{B matches II (B-II)}.

Step 2

Match Wilkinson and Ziegler Catalysts

Examine organometallic and coordination complexes used in homogeneous and heterogeneous polymerizations:

\text{Wilkinson Catalyst: } [(\text{PPh}_3)_3\text{RhCl}] \implies \text{C matches III}

• Wilkinson’s catalyst is a square planar rhodium(I) complex used for selective homogeneous hydrogenation of double bonds.
• Ziegler-Natta Catalyst: A mixture of titanium tetrachloride and trialkylaluminium (TiCl₄ + Al(CH₃)₃ or Al(C₂H₅)₃), used for stereospecific polymerization of ethene into high-density polyethylene (HDPE): D matches IV (D-IV).

Step 3

Synthesize the Complete Match

Combine all four matches into the final answer:

\text{A-I, B-II, C-III, D-IV} \implies \text{Option (3)}

• Matches Option (3) perfectly.

⭐

360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 A

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Swaps Wilkinson catalyst and Ziegler catalyst.

⚠️

Student Fallacy (Why candidates pick this trap): Confusing Rhodium with Titanium catalyst.

2 B

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Assigns PdCl₂ to Haber process.

⚠️

Student Fallacy (Why candidates pick this trap): Completely scrambled matches.

3 C

✓ 100% Correct

Verdict & Scientific Reason:

100% correct. Direct sequential match of all canonical NCERT catalysts.

💡

Why this is airtight: None; textbook mastery of transition metal catalysis.

4 D

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Swaps Wacker oxidation and Ziegler catalyst.

⚠️

Student Fallacy (Why candidates pick this trap): Assigning TiCl₄ to Wacker process.

⚠️

NTA Trap Alert: Swapping Wilkinson and Ziegler Catalysts

Option 1 swaps Wilkinson (Rh) and Ziegler (Ti). Remembering that Wilkinson’s catalyst is the famous Rhodium complex [(PPh₃)₃RhCl] easily prevents this confusion.

🛡️ How to avoid the -1 mark: Remember: Wilkinson = Rhodium (Rh); Ziegler-Natta = Titanium (Ti) + Aluminium (Al)!

📖

Core NEET Syllabus Standard

NEET Chemistry Core Syllabus · The d- and f-Block Elements Standard Benchmark

Core Scientific Principle Tested:

"Haber = Fe, Wacker = PdCl₂, Wilkinson = [(PPh₃)₃RhCl], Ziegler = TiCl₄ + AlR₃."

Syllabus Focus: Catalytic Properties of Transition Metals and Coordination Complexes

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

Haber-Fe, Wacker-Pd, Wilkinson-Rh, Ziegler-Ti ⟹ 1, 2, 3, 4 straight down (Option 3)!

Ready to attempt under real exam pressure?

Test your speed and accuracy in the authentic 180-minute timed NTA simulator.

Launch NEET 2025 CBT Test →

← Previous (Q.79) All Chemistry Questions Grid Next (Q.81) →

Spotted a mistake in this solution? Report an error ([email protected])

⚖️ Legal & Fair Dealing Notice: Sourced from publicly released NEET 2025 question papers and NEET answer keys for private study, research, and non-commercial educational practice under Fair Dealing (Section 52(1)(a) of the Indian Copyright Act, 1957). Not affiliated with or endorsed by NTA or NMC.

NEET 2025 Chemistry Question 80 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Named Catalysts 1-to-1 Sequence Match

Step-by-Step Rigorous Workflow & Mathematical Proof

Match Haber Process and Wacker Oxidation

Match Wilkinson and Ziegler Catalysts

Synthesize the Complete Match

360° Option Elimination Engine Key Feature

NTA Trap Alert: Swapping Wilkinson and Ziegler Catalysts

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

🔗 Related Questions — Coordination Compounds

Coordination Isomerism & IUPAC Nomenclature of Bimetallic Complexes

Ionic Dissociation & Ion Ratio in Potash Alum

Spectrochemical Series & Ligand Field Strength Ordering

Spin-Only Magnetic Moments of Octahedral 3d Complexes

Solve 4 NEET Questions a Day — One per Subject