Kerala Plus Two Chemistry case studies
Kerala Plus Two Chemistry · Put your knowledge to work in context.
Kerala Higher Secondary (+2) Chemistry is the Class 12 chemistry subject examination taken by DHSE and VHSE students in Kerala, usually at the end of a two-year higher secondary course. The mark feeds into the higher secondary certificate and into the marks used for state-level admission processes, so it matters both as a school-leaving result and as a gateway score. The Kerala Plus Two Chemistry case studies are 5 cases and about 3,002 words.
1Coolant by Molality: Meeting a Freezing-Point Specification
A college workshop prepares 1.50 kg of an aqueous coolant for a demonstration chiller. A student adds 250 g of ethylene glycol (molar mass 62.0 g mol^-1) and stirs until homogeneous.
638 words, about 3 min2Copper Plating: Checking Thickness Before Increasing Current
A small plating shop is copper-plating steel badges in a sulfate bath. The owner wants a decorative coating of at least 40 μm on each badge of exposed area 25.0 cm².
632 words, about 3 min3First-Order Vitamin Degradation: Testing a 30-Day Label Claim
A pharmacy student is checking the stability of a liquid vitamin preparation that decomposes by a first-order reaction. From earlier assays, the rate constant at 25 °C is 5.0 × 10^-6 min^-1 and at 35 °C is 2.0 × 10^-5 min^-1.
584 words, about 3 min4Hydrate Isomers: Using Conductivity and Chloride Precipitation
Three unlabelled bottles from a school stockroom each contain a hydrated chromium(III) chloride with the same empirical formula, CrCl3·6H2O, but different arrangements of water and chloride ligands. The teacher labels them A, B and C.
595 words, about 3 min5Four Unlabelled Organic Bottles: Identification and Waste Handling
A student is given four unlabelled bottles from a project shelf: benzaldehyde, acetophenone, benzoic acid and phenol. The supervisor provides only the following test results, obtained under standard conditions.
553 words, about 3 min