| May 26th, 2017 11:20 AM | |
| prince karak | Re: kerala hse chemistry question papers As you want here I am providing Kerala HSE Chemistry Question Papers on your demand : MODEL QUESTION PAPER CHEMISTRY HSE-II Time: 2hrs+15 mts Score 60 1. Even crystals prepared with great care contain internal irregularities called crystal defects. (a) Which stoichiometric defects causes decrease in the density of the crystal? (1) (b) Frenkel defect is not found in alkali metal halides. Why? (1) (c) Differentiate the semiconductors obtained by doping Silicon with: (i) Al (ii) P (2) 2. (a) Calculate the boiling point of 0.05 M solution of Potassium Chloride? (2) (b) Name any two examples for Osmosis from daily life. (1) (c) Which process is used in desalination of sea water? (1) 3. (a)You are given the following standard electrode potential values. E°Al 3+ /Al = -1.66 V and E°Zn 2+ /Zn = -0.76 V. (i) Draw a neat diagram of the Daniel cell using the above electrodes. Write the electrode reactions. (2) (ii) Calculate the e.m.f of the above cell (1) (b) Suggest two materials other than Hydrogen that can be used as fuels in fuel cells. (1) 4. (a) The unit of the rate constant k for two different reactions are given. (i) mol L -1 s -1 (ii) mol -1 L s -1 Write respective orders of the reactions. (2) (b) The rate constants of a reaction at 700 K and 780 K are 0.011s -1 and 0.105s -1 respectively. Calculate the energy of activation (2) 5. (a) Physical and chemical adsorption respond differently to rise in temperature. (i) Is this statement correct? (½) (ii) Establish your answer using a suitable graph? (1½) (b) Colloids show kinetic, electrical as well as optical properties. Give one each of kinetic and optical properties (1) 6. The modern process of extraction of Aluminium by electrolytic reduction of Alumina was developed by two young Scientists. (a) What is this process known as? (½) (b) Briefly discuss this process? (2) (c) How is Aluminium refined? (½) 7. Assign reasons for the following: (a) Ammonia has greater affinity for protons than phosphine (2) (b) SF6 is much less reactive than SF4 (1) Kerala HSE Chemistry Question Papers    |
| May 26th, 2017 11:18 AM | |
| Unregistered | Re: kerala hse chemistry question papers Hi buddy here I have come to get Kerala HSE Chemistry Question Papers , so would you plz provide me same here ?? |
| January 11th, 2016 04:28 PM | |
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