Chemistry-72.Phase-2-Objective

FACULTY TRAINING TEST PHASE - II CHEMISTRY SCREENING PAPER Time: 1 Hour Maximum Marks: 90 Instructions: 1. This paper consists of 30 QUESTIONS only. 2. Attempt ALL questions. 3. Each correct answer carries 3 marks and each incorrect answer carries –1 mark. 4. Use of Calculator is NOT PERMITTED Name : 00000000000000000 Subject : 00000000000 1. For the reaction 4A + B  2C + 2D, which of the following statement is not correct? (A) The rate of disappearance of B is one fourth of the rate of disappearance of A (B) The value of formation of C is one half of the rate of consumption A (C) The rate of appearance of D is half of the rate of disappearance of B (D) The rates of formation of C and D are equal 2. For a chemical reaction 2X + Y Z, the rate of appearance of Z is 0.05 mol L–1 per min. The rate of disappearance of X will be (A) 0.05 mol L–1 per hour (B) 0.05 mol L–1 per min (C) 0.1 mol L–1 min–1 (D) 0.25 mol L–1 per min 3. A gaseous reaction A2(g)  B(g) + C(g) Shows increase in pressure from 100mm to 120 mn in 5 minutes. The rate of disappearance of A2 is (A) 4 mm min–1 (B) 8 mm min–1 (C) 16 mm min–1 (D) 2 mm min–1 4. A first order reaction is 75% complete after 32 minutes. When was 50% of the reaction complete? (A) 4 minutes (B) 8 minutes (C) 16 minutes (D) 32 minutes 5. A first order reaction has specific rate constant of 2min–1. The half – life of this reaction will be (A) 1.653 min (B) 0.347 min (C) 2 min (D) 0.5 min 6. A first order reaction is 50% complete in 30 minutes at 27°C and in 10 minutes at 47°C. The energy of activation of the reaction is (A) 43.84 kJ mol–1 (B) 34.84 kJ mol–1 (C) 84.00 kJ mol–1 (D) 30.00 kJ mol–1 7. Velocity constant of a reaction at 290K was found to be 3.2  10–3. At 300K it will be (A) 1.28  10–2 (B) 9.6  10–3 (C) 6.4  10–3 (D) 3.2  10–4 8. The value of K for the reaction 2A(g) B(g) + C(g) at 750K and 10 atm pressure is 2.86. The value of K at 750 K and 20 atm is (A) 28.6 (B) 5.72 (C) 2.86 (D) 11.49 9. At constant temperature, if a small amount of one of the products is removed, the equilibrium constant (A) increases (B) decreases (C) remains unaffected (D) first increases and then decreases 10. Pure ammonia is placed in a vessel at a temperature where its dissociation is appreciable. At equilibrium. (A) Kp does not change significantly with pressure (B)  does not change with pressure (C) concentration of NH3 does not change with pressure (D) concentration of H2 is less than that of N2 11. When two reactants; A and B are mixed to give products C and D, the reaction quotient, Q at the initial stages of the reaction (A) is zero (B) decreases with time (C) in independent of time (D) increases with time 12. 56 g of N2 and 6g of H2 were kept at 400°C in 1 litre vessel. The equilibrium mixture contained 27.54 g of NH3. The approximate value for Kc for the above reaction in mol2 lit–2 is (A) 10 (B) 20 (C) 30 (D) 40 13. The equilibrium constant, Kp for the reaction; 2SO2(g) + O2(g) 2SO3(g) is 4.0 atm–1 at 1000K. What would be the partial pressure of O2 if at equilibrium the amount of SO2 and SO3 is the same? (A) 16.0 atm (B) 0.25 atm (C) 1 atm (D) 0.75 atm 14. The vapour density of N2O4 at a certain temperature is 30. What is the percentage dissociation of N2O4 at this temperature? (A) 53.3% (B) 106.6% (C) 26.7% (D) None 15. The change in pressure will not affect the equilibrium constant for (A) N2 + 3H2 2NH3 (B) PCl5 PCl3 + Cl2 (C) H2 + I2 2HI (D) all the above three reactions 16. Three solutions A,B and C are prepared by adding NaCl, NaOH and HCl acid respectively. Then ionic product of water will (A) increases in A, decrease is B and C (B) increase in B, decrease in A and C (C) increase in C, decrease in A and B (D) remain the same in all the three 17. 100 ml at a solution contains 0.1 M NH4OH and 0.1M NH4Cl. The pH of the solution will not change on adding (A) 20 ml of 0.1M NH4OH solution (B) 20 ml of 0.1M NH4Cl solution (C) 10 ml of 0.1M NaOH solution (D) 10 ml of distilled water 18. The pH of the neutralisation point of 0.1N ammonium hydroxide with 0.1N HCl is (A) 1 (B) 6 (C) 7 (D) 9 19. In which of the following, the solubility of AgCl will be maximum (A) 0.1M NaNO3 (B) water (C) 0.1M NaCl (D) 0.1M NaBr 20. The hydrogen ion concentration of 0.2N CH3COOH which is 40% dissociated is (A) 0.08 N (B) 0.12 N (C) 0.80 N (D) 1.2 N 21. 0.01mole of lime (CaO) was dissolved in 100cm3 of water. Assuming the base is completely ionised in the solution, the pH of the solution will be (A) 13 (B) 13.3 (C) 12.3 (D) 12.0 22. The pH of the solution produced when an aqueous solution of pH = 5 is mixed with equal volume of an aqueous solution pH = 3 is (A) 3.3 (B) 4.5 (C) 3.5 (D) 4.0 23. How much sodium acetate should be added to 0.1M solution of CH3COOH to give a soluton of pH 5.5 (PKa of CH3COOH = 4.5) (A) 0.1M (B) 0.2M (C) 1.0M (D) 10.0M 24. The solubility product of AgCl is 1.44  10–4 at 100°C. The solubility of AgCl in boiling water will be (A) 0.72  10–4 M (B) 1.20  10–2 M (C) 0.72  10–2 M (D) 1.2  10–4 M 25. 20 cm3 of xM solution of HCl is exactly neutralised by 40cm3 of 0.05 M NaOH solution the pH of HCl solution is (A) 1.0 (B) 2 (C) 1.5 (D) 2.5 26. Which of the following is expected to be correct? (A) PKa(CH3COOH)  PKa(HCOOH) PKa(CH3CH2COOH) (B) PKa(HCOOH)  PKa(CH3COOH)  PKa(CH3CH2COOH) (C) PKa(HCOOH)  PKa(CH3COOH)  PKa(CH3CH2COOH) (D) None 27. Which of the following species would be least likely to act as a Lewis base (A) PCl3 (B) CN– (C) I+ (D) SCl2 28. The activation energy of the forward and reverse reaction are 30.5 and 45.4 kJ mol–1 respectively (A) exothermic (B) endothermic (C) neither exothermic nor endothermic (D) independent of temperature 29. 1 mole of NO2 and 2 moles of CO were enclosed in a vessel NO2 + CO NO + CO2 At equilibrium, 25% of initial at amount of CO were consumed. The equilibrium constant Kp for above reaction is equal to (A) 1/2 (B) 1/3 (C) 1 (D) none 30. The solubility product for Ca3(PO4)2 is Ksp = 1.3  10–26. What is the solubility of Ca3(PO4)2 in moles per litre of solution (A) 1.3  10–26 M (B) 1.5  10–7 M (C) 2.6  10–6 M (D) 4.6  10–6 M 6 FACULTY TRAINING TEST PHASE - II CHEMISTRY SCREENING PAPER 1. C 2. C 3. B 4. C 5. B 6. A 7. C 8. C 9. C 10. A 11. D 12. A 13. B 14. A 15. D 16. D 17. D 18. B 19. B 20. A 21. B 22. A 23. C 24. B 25. A 26. D 27. C 28. B 29. B 30. C 6