NEB Chemistry Practicals — Class 12

The complete Class 12 NEB chemistry practical syllabus as realistic virtual experiments. Standardise potassium permanganate with a hot oxalic acid flask, work through the full Group I-VI cation analysis scheme on genuinely unknown salts, verify Faraday's law by electroplating copper, measure pH with four different tools, identify organic functional groups, determine the heat of neutralisation in a live calorimeter, and run Lassaigne's sodium fusion test for N, S and halogens. Every simulation enforces real procedure — skip the heating, use a cold flask or test out of order and you will see exactly why it fails.

You will learn: doneRedox titration with a self-indicating endpoint doneSystematic qualitative analysis (Group I-VI cation scheme) doneElectrolysis and Faraday's laws quantitatively donepH measurement and buffer behaviour doneOrganic functional group identification doneThermochemical measurement and ΔH calculation doneDetection of N, S and halogens in organic compounds

play_arrow Start course play_lesson7 lessons schedule~123 min total

Lessons

1 water_drop Redox Titration with KMnO₄ Standardise potassium permanganate against oxalic acid: heat the flask to 60-70 °C (skip it and watch the trial fail), titrate to the first permanent pink, and calculate the molarity from the 2:5 mole ratio. 3D virtual lab 20 min done 2 account_tree Full Salt Analysis Scheme A genuinely unknown salt, the full systematic scheme: preliminary observations, dry heating, flame test, then group reagents I to VI in strict order until a precipitate betrays the cation — finish with the confirmatory test. 3D virtual lab 20 min done 3 bolt Electrolysis of CuSO₄ Pass a measured current through copper sulphate solution between copper electrodes, watch Cu²⁺ ions migrate, weigh the cathode before and after, and verify Faraday's first law: m = ZIt. 3D virtual lab 16 min done 4 palette pH & Indicators Measure the pH of eleven solutions from dilute HCl to NaOH using litmus, universal indicator, pH paper and a digital meter — then add acid drops to blood and discover what a buffer really does. 3D virtual lab 15 min done 5 hub Organic Functional Group Tests Four unlabelled organic liquids — alcohol, aldehyde, carboxylic acid, phenol. Run sodium metal, Tollens', Fehling's, NaHCO₃, FeCl₃ and ester tests in any order, cross-check the results and name the functional group. 3D virtual lab 18 min done 6 device_thermostat Heat of Neutralization Mix measured HCl and NaOH in a polystyrene calorimeter, catch the temperature peak on a live graph, compute ΔH = −mcΔT/n, and discover why a weak acid releases measurably less heat. 3D virtual lab 16 min done 7 join_inner Lassaigne's Test: N, S & Halogens Fuse an unknown organic compound with sodium metal, prepare the sodium extract, and run the classic detective tests — Prussian blue for nitrogen, violet nitroprusside for sulphur, silver halide precipitates for Cl and Br. 3D virtual lab 18 min done