January 30, 2014

IPE Junior Inter Chemistry Important Questions - Acids, Bases and Hydrozen

Thermodynamics: Most of the times two 2 marks or one 4 marks questions are asked from "Thermodynamics". Learn all
the basics of the lesson as they are inter related with chemical equilibrium and electro chemistry.

Hess's law of constant heat summation, Born-Haber Cycle are important for 4 marks.
Enthalpy, Entropy, Gibbs energy, 1st, 2nd, 3rd laws of thermodynamics, relationship between CP and CV, extensive & intensive properties, heat capacity, problems on ΔH = Δ U + Δn R T, heat of formation, heat of combustion,
heat of ionisation, ΔG, ΔS, effect of temperature on spontaneity of reactions are important for 2 marks.

Chemical Equilibrium, Acids - Bases

Even in March 2013 exam one 2 marks and one 4 marks question is asked, there is a possibility of one 8 marks question from "Chemical Equilibrium and Acids-Bases". Learn Lechatlier's principle, and Synthesis of SO3 &
NH3 for 8 Marks.

Lewis, Bronsted theories of Acids & Bases, Conjugate Acid-base pairs, pH definition, problems, buffer solutions (Def., types, examples, Henderson equation related problems, buffer action), buffer capacity salt hydrolysis def. & nature of 3 types of salt solutions, solubility product, common ion effect, writing KC, KP for the reactions, relation between KC & KP, 2 types of equilibria def., eg., factors influencing chemical equilibrium, KW (def., its value at 25°C, temperature dependence), problems 7.14, 7.15, 7.17, 7.25, 7.26, 7.27, 7.28 are very important for 2 marks and 4 marks.

Hydrogen and Its Compounds

In this lesson learn uses & structure of H2O2, MP, BP, uses of D2O, why BPs of NH3, H2O, HF are higher than the subsequent members of the group, coal gasification, auto protolysis, water gas shift reaction, 3 types of
hydrides, problems on H2O2 and hardness of water, amphoteric nature of H2O are important for 2 marks.

All the oxidising & reducing properties of H2O2, electrolytic method and auto oxidation methods of preparation of H2O2, H2 as a fuel are very important for 4 marks.

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