QUESTION PAPER

JAWAHAR NAVODAYA VIDYALAYA AMARKANTAK ANUPPUR M.P. UNIT TEST NO. 2 CLASS XI SUBJECT : CHEMISTRY (THEORY) TIME: 2 HR M.M. 50 Roll No. ________ INSTRUCTION: 1. Question Paper consist of Q No. 1-10 (1 Mark), Q.No.11-20 (2 Mark), Q. No. 21-25 ( 3 Marks) 26 (5 Marks) 2. Sub Instrucctions are given in each section. 3. Provide proper diagram if needed. (FOR NON LATERAL ENTRY) Which of the following molecule have zero dipole moment: H2O or BF3 Draw the resonating structure of Carbonate ion? Group the following as linear and non-linear molecules: H2O, HOCl, BeCl2 , Cl2O What type of hybridization is involved in carbon atoms of benzene? What shapes are associated with following hybridization: Sp3 and sp3d2 FOR LATERAL ENTRY What is meant by compressibility factor? Name the intermolecular forces b/w Cl2 and CBr4 Write down the vanderwall real gas equation? What is the effect of surface area on evaporation Which is more viscous Honey or milk? FOR BOTH LATERAL AND NON LATERAL What is the unit of a and b? Why falling liquid drops are spherical? Why evaporation leads to cooling of the liquid? Out of NH3 and N2 which will have larger value of a ? What is Boyle temperature? FOR NON LATERAL ENTRY Arrange the following on the basis of increasing ionic character: C-H , F-H, Br-H, Na-I, K-F, and LiCl Why ICl is reactive in comparision to I2? Compare the type of bonding in both? Which of the two molecules OCS and CS2 has a higher dipole moment and why? Which type of hybridization explain the trigonal bipyramidal shape of SF4? Why are noble gases monoatomic? FOR LATERAL ENTRY STUDENT 11. Derive combined gas equation? 12. What is meant by critical temperature and critical volume? Give the values of Carbon Dioxide in support of your answer? 13 Convert the following temperature into K scale: a. 234 o C b. 342oC 14 What is the unit of Gas Constant R? Derive 15 What is STP and write the value of T, P and V for one mole of Gas at STP FOR BOTH LATERAL AND NON LATERAL Calculate the temperature of 4.0 mol of a gas occupying 5 dm3 at 3.32 bar. (R= 0.083 bar dm3 K-1 mol-1) How much time would it take to distribute one Avogadro number of wheat grains, if 1010 grains are distributed each second? What will be the pressure of the gaseous mixture when 0.5 L of H2 at 0.8 bar and 2.0 L of dioxygen at 0.7 bar are introduced in a 1 L vessel at 27o C? A vessel of 120 mL capacity contains a certain amount of gas at 35o C and 1.2 bar pressure. The gas is transferred to another vessel of volume 180 mL at 35o C What would be its pressure? At 0o C, the density of a certain oxide of a gas at 2 bar is same as that of dinitrogen at 5 bar. What is the molecular mass of the oxide? FOR NON LATERAL AND LATERAL Explain the following term:a. Boyele’s Law b. Charles Law c. Dalton’s law Write down the postulate of Kinetic theory of gases with proper reference? Derive Vanderwall gar equation? Explain the property of liquid under following head: Compressibility Viscosity Surface tension Explain the following terms: Isobar b. Isochore c. Isotherm Explain on the basis of MOT the following: N2, N22+ and N22- Or// O2 , O22+ and O22- Under following heads: Bond Order Bond stability Bond Length order Paramagnetic / Diamagnetic Electronic Configuration