Chemistry-77.Phase-5-Objective

FACULTY TRAINING TEST PHASE - V 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. If E0 (Fe3+/Fe) = – 0.036 V & E0 (Fe2+/Fe) = – 0.439 V, the value of E0 (Fe3+, Fe2+/Pt) is (A) – 0.475 V (B) 0.403 V (C) 0.77V (d) 0.986 v 2. The standard reduction potential of 2H2O + 2e–  H2 + 2OH– at 298 K is (A) 0.828 V (B) – 0.828 V (C) 0.414 V (D) – 0.414V 3. If E0 (Fe2+/Fe) = – 0.44V & E0(Pb2+/Pb) = – 0.13V, then adding powdered Pb & Fe to a solution containing 1 M in each of Pb2+ & Fe2+ ions would result into the formation of (A) more of Pb & Fe2+ ions (B) more of Fe & Pb2+ions (C) more of Fe & Pb (D) more of Fe2+ & Pb2+ ions 4. In acidic medium Cr2O72– is converted to Cr3+ when it acts as an oxidising agent. The quantity of electricity required to reduced 0.05 mole of Cr2O72– would be (A) 0.05 F (B) 0.1 F (C) 0.2 F (D) 0.3 F 5. The magnetic moment of Fe2+ ion interms of Bohr magneton is (A) 0.0 (B) 1.73 (C) 2.83 (D) 4.9 6. Of the following complexes, which one is diamagnetic in nature? (A) [CoF6]3– (B) [NiCl4]2– (C) [Ni(NH3)4]2+ (D) [Ni(CN)4]2– 7. Of the following statements, which one is correct? (A) [CoF6]3– is a high spin complex & [Co(NH3)6]3+is a low spin complex (B) [CoF6]3– is a low spin complex & [Co(NH3)6]3+ is a high spin complex (C) Both [CoF6]3– & [Co(NH3)6]3+ are low spin complexes (D) Both [CoF6]3– & [Co(NH3)6]3+ are high spin complexes 8. The edge length of unit cell of sodium chloride is 564 pm. If the size of Cl– ion is 181 pm, the size of Na+ ion would be (A) 383 pm (B) 282 pm (C) 101 pm (D) 202 pm 9. The co-ordination number of metal crystallizing in hexagonal close-packed (hcp) structure is (A) 12 (B) 10 (C) 8 (D) 6 10. Which of the following statements is correct? (A) The co-ordination number of each type of ion in CsCl crystal is 8 (B) A metal that crystallizes in bcc structure has a co-ordination of number of 12 (C) The length of the unit cell in NaCl is 552 pm ( = 95 pm, = 181 pm) (D) The packing fraction for bcc structure is 0.52 11. Which of the following compounds is expected to be coloured (A) Ag2SO4 (B) CuF2 (C) MgF2 (D) CuCl 12. Copper displaces which of the metal from the salt solutions? (A) AgNO3 (B) ZnSO4 (C) FeSO¬4 (D) All of the above 13. Copper sulphate solution reacts with KCN to give (A) Cu(CN)2 (B) CuCN (C) K2[Cu(CN)4] (D) K3[Cu(CN)4] 14. When ammonia is added to a cupric salt solution, the deep blue colour so observed is due to the formation of (A) [Cu(OH)4]2– (B) [Cu(NH3)4]2+ (C) [Cu(H2O)2(NH3)2]2+ (D) [Cu(H2O)4]2+ 15. The oxidation number of Pt in [Pt(C2H4)Cl3]– is (A) +1 (B) +2 (C) +3 (D) +4 16. K4[Fe(CN)6] is called (A) Potassium hexacyanoferrate (II) (B) Potassium hexacyanoferrate (III) (C) Potassium ferricyanide (D) Prussian blue 17. Among the following ions which one has the highest paramagnetism? (A) [Cr(H2O)6]3+ (B) [Fe(H2O)6]2+ (C) [Cu(H2O)6]2+ (D) [Zn(H2O)6]2+ 18. The shape of [Cu(NH¬3)4]2+ is square planar, Cu2+ in the complex is (A) sp3 hybridised (B) dsp2 hybridised (C) sp3d hybridised (D) sp3d2 hybridised 19. AgCl dissolves in NH4OH due to the formation of (A) [Ag(NH4)2]Cl (B) [Ag(NH3)3]Cl (C) [Ag(NH3)2]Cl (D) [Ag(NH3)2OH] 20. Which of the following metals is obtained by leaching its ore with dilute cyanide solution (A) Silver (B) Titanium (C) Vanadium (D) Zinc 21. In the forth-floation process for purification of ores, the ore particles float because (A) They are light (B) Their surface is not easily wetted by water (C) They bear electrostatic charge (D) They are insoluble 22. Of the following metals, which one cannot be obtained by electrolysis of the aqueous solution of its salt is (A) Ag (B) Mg (C) Cu (D) Al 23. Which method of furification is represented by the following equations? Ti + 2I2 (A) Cupellation (B) Pohing (C) Van-Arkel (D) Zone refining 24. Cryolite is the ore of (A) Aluminium (B) Zinc (C) Iron (D) Silver 25. Which of the following metals cannot be extracted by carbon-reduction process? (A) Pb (B) Al (C) Hg (D) Zn 26. How many electrons are there in one coulomb? (A) 6.023  1023 (B) 96500 (C) 1.6  10–19 (D) 6.24  1018 27. How much current is necessary to produce hydrogen gas at a rate of 1200 cc per second at NTP conditions? (A) 96500 ampere (B) 48250 ampere (C) 8.616 ampere (D) 14800 ampere 28. The e.m.f. of half cell PtH¬2 (2 atm) | HCl (a = 0.02) & E0OP= OV is (A) + 0.19 volt (B) + 0.403 volt (C) – 0.409 volt (D) – 0.109 volt 29. Given & . Then (A) Ag+ can be reduced by H2 (B) Ag can oxidise H2(g) to H+ (C) Zn2+ can be reduced by H2 (D) Ag can reduce Zn2+ 30. The complex ion [Co(en)2Cl2]+ exihibits (A) cis-trans isomerism only (B) cis-trans isomerism and linkage isomerism (C) cis-trans isomerism and optical isomerism (D) Optical isomerism and linkage isomerism 6 Answers 1. C 2. B 3. A 4. D 5. D 5. D 6. A 7. C 8. A 9. A 10. B 11. A 12. D 13. B 14. B 15. A 16. B 17. B 18. C 19. A 20. B 21. B 22. A 23. A 24. B 25. D 26. A 27. A 28. A 29. C 30. A

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