The total number of reagents from those given below, that can convert nitrobenzene into aniline is _ — Amines Chemistry Question

💡 Solution & Explanation

**Step 1: Identify the reaction type** Nitrobenzene (C₆H₅NO₂) must be reduced to aniline (C₆H₅NH₂). This requires reduction of the nitro group (-NO₂) to an amino group (-NH₂). **Step 2: Evaluate each reagent** **I. Sn – HCl:** ✓ Classic reduction method. Sn reduces NO₂ to NH₂ in acidic conditions. **II. Sn – NH₄OH:** ✗ Ammonium hydroxide is basic, which prevents the reduction. The acidic medium is essential. **III. Fe – HCl:** ✓ Iron metal reduces NO₂ to NH₂ in acidic medium. Common laboratory method. **IV. Zn – HCl:** ✓ Zinc is a strong reducing agent that converts NO₂ to NH₂ in acidic conditions. **V. H₂ – Pd:** ✓ Catalytic hydrogenation. Pd catalyst enables H₂ addition to reduce NO₂ to NH₂. **VI. H₂ – Raney Nickel:** ✓ Raney Ni is an excellent hydrogenation catalyst that reduces NO₂ to NH₂. **Step 3: Count successful reagents** Successful reagents: I, III, IV, V, VI = 5 reagents Therefore, the answer is 5.00.