UPMSP Intermediate Chemistry case studies
UPMSP Intermediate Chemistry · Put your knowledge to work in context.
The UPMSP Intermediate Chemistry examination is the Class 12 chemistry paper set by the Uttar Pradesh Madhyamik Shiksha Parishad (UP Board) for students completing higher secondary schooling in Uttar Pradesh. It is a school-leaving and board-certification exam rather than a professional licence: candidates sit it to complete Class 12, and the resulting marks feed into higher-education admissions and eligibility for competitive entrance tests. The UPMSP Intermediate Chemistry case studies are 5 cases and about 3,028 words.
1Freezing-point data from three colourless solutions
In a Class XII practical, three 0.100 m aqueous solutions are prepared from glucose, sodium chloride and acetic acid. Freezing points are read with a digital thermometer whose stated accuracy is ±0.1 K: glucose −0.186 °C, sodium chloride −0.350 °C and acetic acid −0.191 °C.
568 words, about 3 min2A Daniell cell that gives the wrong voltage after dilution
A student assembles a Daniell cell: Zn(s) Zn2+(1.0 M) Cu2+(1.0 M) Cu(s), using a porous pot instead of a salt bridge. A voltmeter reads 1.08 V at 298 K.
520 words, about 3 min3Iodine-clock runs with a fixed thiosulphate delay
In a kinetics practical, 10.0 mL of 0.20 M potassium persulphate, 10.0 mL of 0.20 M potassium iodide, 5.0 mL of 0.010 M sodium thiosulphate and 25.0 mL of water are mixed at 25 °C. The time until the starch turns blue is recorded as 45 s.
700 words, about 4 min4Identifying a green hydrated nickel salt by EDTA and qualitative tests
A 0.315 g sample of a green hydrated salt dissolves in water to give a pale green solution. With dilute NaOH it gives a green precipitate that does not dissolve in excess NaOH.
552 words, about 3 min5AgNO3 times and KOH products for three bromoalkanes
Three bottles contain 1-bromobutane, 2-bromobutane and 2-bromo-2-methylpropane. Equal volumes of each are added to separate tubes containing 10 mL of 0.10 M AgNO3 in ethanol at 25 °C.
688 words, about 3 min