Pharmacy - P.E.C.E.
What the paper tests
P.E.C.E. is the JCECEB pharmacy entrance route for B.Pharm admission in Jharkhand. It tests 10+2 Physics, Chemistry and Biology or Mathematics, with chemistry carrying the heaviest conceptual load. Pharmaceutical awareness-drug forms, routes and storage-can appear as applied items.
Core rules and concepts
- Physical chemistry: mole concept, stoichiometry, molarity, dilution, equilibrium, thermodynamics and electrochemistry.
- Organic chemistry: functional groups, isomerism, aromaticity, reaction mechanisms and named reactions.
- Inorganic chemistry: periodicity, bonding, coordination compounds and qualitative analysis.
- Physics: units, optics, electricity and measurement.
- Biology for PCB candidates: cell structure, human physiology and basic microbiology.
Worked example
Prepare 250 mL of 0.1 M NaCl. Molar mass of NaCl = 58.44 g/mol. Moles needed = (0.1 \times 0.250 = 0.025) mol. Mass = (0.025 \times 58.44 = 1.461) g. Weigh 1.461 g, dissolve and make up to 250 mL. The reasoning: molarity is moles per litre, so convert volume to litres before multiplying.
Traps that cost marks
- Using 250 mL directly as 250 L in the molarity formula.
- Confusing molarity with normality; they are equal only when the equivalent factor is 1.
- Rounding intermediate values too early.
- Ignoring stereochemistry when a question asks about isomers.
- Mixing up dilution: adding solvent changes volume, not moles of solute.