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#1
23rd August 2014, 12:59 PM
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| WBJEE chemistry Last years question paper
I need the WBJEE chemistry Last years question paper, will you please provide me the same????????
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#2
23rd August 2014, 03:32 PM
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| Re: WBJEE chemistry Last years question paper
As per your request here I am sharing the WBJEE chemistry Last years question paper: WBJEE chemistry Last years question paper Question 1 Cadmium rods are used for which purpose? A Emit electrons B Absorb neutrons C Emit neutrons D Absorb electrons Question 2 Propionic acid and KOH reacts to produce which one of the following? A Potassium propionare B Propyl alcohol C Propionaldehyde D Does not react Question 3 What is the effect of dilution on the equivalent conductance of Strong electrolyte? A Decrease on dilution B Remains unchanged C Increase on dilution D None of the above Question 4 35.4 ml.. of HCI is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is? A 0.97 N B 0.142 N C 0.194 N D 0.244 N Question 5 A liquid is in equilibrium with its vapour at its boiling point. On the average, the molecules in two phases have equal A inter- molecular forces B potential energy C kinetic energy D total energy Question 6 Which one of the following pairs is obtained on heating ammonium dlchromate? A N2 and H2O B N and H20 C NO2 and H D NO and NO2 Question 7 1 mole of photon, each of frequency 2500 s, would have approximately a total energy of A l erg B 1J C 1 eV D 1 MeV Question 8 Which relatiou A dG=Vdp-SdT B dE=pdV+TdS C dH=-Vdp+TdS D dG=Vdp+SdT Question 9 The ease of dehydrohalogenation of ailcyl halide with alcoholic KOH is A 3°<2°<1° B 3°>2°>1° C 3°<2°>1° D 3>2°<1° Question 10 When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified as: A Zn B Fe C Pb D Hg Question 11 The pair of compound which cannot exists together in solution is A NaHCO3 and NaOH B Na2CO3 and NHCO3 C Na2CO3 and NaOH D NaHCO3 and NaCl Question 12 Which one of the following processes is used for the manufacture of calcium? A Reduction of CaO with carbon B Reduction of CaO with hydrogen C Electrolysis of a mixture ofanhydrousCaCl2 and KCI D Electrolysis of molten Ca (0H2) Question 13 The time taken for 10% completion of a first order reaction is 20 mm. Then, for 19% completion, the reaction will take A 40min B 6Omin C 30 mm D 50 mm Question 14 Explain why aniline is not as basic as ammonia? A 0.59 V B 0.00 V C — 0.59 V D — 0.059 Question 15 The correct order of decreasing acidity of nitrophenols will be A m -nitrophenol >p-nitrophenol> o-nitrophenol B o-nitrophenol> m-nitrophenol> p-nitrophenol C p-nitrophenol > m-nitrophenol> o.nitrophenoI D p-nitxophenol > o-nitrpheno1> m-nitrophenol Question 16 The molecule having largest dipole moment among the following is: A CHI3 B CH4 C CHCI3 D CC14 Question 17 Which has maximum number of atoms? A 24gofC B 56gofFe C 26gofAI D 108gofAg Question 18 Fe(OH)3 can be separated from AI(OH)3 by the addition of A NaCI solution B dil. HCl solution C NaOH solution D NH4Cl and NH0H Question 19 Which of the following will decrease the pH of a 50 mL solution of 0.01 M HC1? A Addition of 5 mL of 1 M HC1 B Addition of 50 mL of 0.01 M HCI C Addition of 50 mL of 0.002 M HCI D Addition of Mg Question 20 Wrong For a reversible chemical reaction where the forward process is exothermic, which of the following statements is correct? A The backward reaction has higher activation energy than the forward reaction B The backward and the forward processes have the same activation energy C The backward reaction has lower activation energy |