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June 16th, 2014, 03:25 PM
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NIOS Senior Secondary Exam-Chemistry (313) Exam paper
Give me question paper for National Institute Of Open Schooling Senior Secondary Exam-Chemistry (313) Examination ? Here I am giving you question paper for National Institute Of Open Schooling Senior Secondary Exam-Chemistry (313) Examination in PDF file attached with it so you can get it easily.. 1. Define ‘molar mass’ of a molecular substance. 1 2. Why is Dalton’s law of partial pressure not applicable to a system of ammonia and hydrogen chloride gas? 1 3. What would be the coordination numbers of an ion occupying (a) an octahedral void and (b) a tetrahedral void? 1 4. Calculate the number of carbon-12 atoms in (a) 96 u and (b) 96 moles of carbon-12 sample. 5. Define ‘ionization enthalpy’. What is the relation between atomic size and ionization enthalpy? 2 6. Explain the conditions which make a liquid to have wetting or non-wetting nature on the surface of a solid. 2 7. Define Hess’s law of constant heat summation. What is the basis of this law? 2 8. Name any one metal oxide which is not reduced to the metal when heated with carbon. Which process is normally used for the reduction of this oxide ore? Write chemical equation for the same. 2 9. (a) Write the IUPAC name of the following compound : (b) Name the product formed when ethyne is oxidised with cold alkaline solution of KMnO4. 2 10. If 20 g of calcium carbonate is added to a solution containing 20 g of HCl, what substances will be present when the reaction is over and how many grams of each of them will be there? 11. (a) What is wave number? How is it related to wavelength? (b) Calculate the wavelength of the Balmer line corresponding to n2 4 = . [ RH cm = - 109677 1 ] 4 313/OSS/205A 4 CH —CH—CH—CH 3 3 12. (a) 1 g of a non-volatile solute was dissolved in 100 g of acetone (molecular mass = 58 u) at 298 K. The vapour pressure of the solution was found to be 192•5 mm Hg. Calculate the molecular mass of the solute. The vapour pressure of pure acetone at 298 K is 195 mm Hg. (b) Define : (i) Molality (ii) Molarity 4 13. (a) How does a Bronsted-Lowry acid differ from an Arrhenius acid? Choose the Bronsted-Lowry acids among the following species : (b) Combustion of coal in air is an exothermic reaction. Why does coal not burn by itself when kept in air for any period of time, but once initiated by flame, it continues to burn? 4 Last edited by Neelurk; February 17th, 2020 at 11:44 AM. |
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