Kerala SSLC Chemistry case studies
Kerala SSLC Chemistry · Put your knowledge to work in context.
The Kerala SSLC (Secondary School Leaving Certificate) examination is the state-level school-leaving examination administered through the Kerala Pareeksha Bhavan portal, which is the official source for SSLC circulars, timetables and results. Candidates who reach the end of secondary schooling in Kerala sit it, and the portal also lists parallel streams such as SSLC (HI), THSLC, THSLC (HI) and AHSLC, so a candidate should confirm which stream and subject combination applies to them before planning revision. The Kerala SSLC Chemistry case studies are 5 cases and about 2,523 words.
1The Argon Radius That Breaks the Period 3 Trend
In a Kerala school laboratory, a student records the atomic radii (in picometres) of the Period 3 elements from a data booklet: Na 186, Mg 160, Al 143, Si 118, P 110, S 104, Cl 99 and Ar 192. She notices that the radius decreases from Na to Cl as expected, but Ar is larger than Cl.
547 words, about 3 min2Limiting Reactant in a School Hydrogen Preparation
A student in Kozhikode is asked to prepare hydrogen gas using 5.0 g of zinc granules labelled ‘80% pure’ and 100 mL of 2.0 M hydrochloric acid. She calculates the expected volume from the acid and predicts 2.24 L of hydrogen at STP.
525 words, about 3 min3Faulty Nickel Electroplating on an Iron Key
A student electroplates an iron key with nickel using a nickel anode, a nickel sulphate electrolyte and a 6 V battery. The key is connected to the negative terminal and the nickel strip to the positive terminal.
482 words, about 2 min4Liming Three Plots With Different Soil pH
A farmer in Idukki has three plots and measures the soil pH with a school pH meter: Plot A 4.8 under cardamom, Plot B 8.3 after heavy liming last season, and Plot C 6.4 under pepper. The farmer has three materials available: lime (CaCO3), slaked lime (Ca(OH)2) and gypsum (CaSO4·2H2O).
495 words, about 2 min5Identifying Three Unlabelled Organic Liquids
Three unlabelled colourless liquids are kept in a school laboratory: A, B and C. A has a sharp smell, turns blue litmus red and gives brisk effervescence with sodium hydrogencarbonate solution.
474 words, about 2 min