Title 8B.HEAVY METALS QUESTIONS_Final (224 - 248 ).pdf ✅

HEAVY METALS 224 NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED VOL - VII NISHITH Multimedia India (Pvt.) Ltd., LEVEL-V SINGLE ANSWER QUESTIONS 1. The stable oxidation states of Mn are (A) +2, +3 (B) +2, +7 (C) +3, +7 (D) +3, +5. 2. FeSO4 solution gives brown colour ring in testing nitrates or nitrites. This is due to formation of (A) 2 2 5 [Fe(H O) NO]  (B) 2 2 5 2 [Fe(H O) NO ]  (C) 2 2 4 2 [Fe(H O) (NO) ]  (D) 2 2 4 [Fe(H O) NO]  3. – MnO4 is of intense pink colour, though Mn is in (+7) oxidation state. It is due to (A) oxygen gives colour to it (B) charge transfer when Mn gives its electron to oxygen (C) charge transfer when oxygen gives its electron to Mn making it Mn (+VI) hence coloured (D) None is correct. 4. 3+ Ti ion is purple while 4 Ti  ion is colourless, because: (A) 3+ Ti had 3d1 configuration (B) Ti4+ has 0 3d configuration (C) Ther is no crystal field effect in Ti4+ (D) Ti4+ is very small cation when compared to 2 Ti  and hence does not absorb any radiation 5. VO2 is an amphoteric oxide and in non oxidizing acidic medium it forms (A) VO2+ (B) VO+ 2 (C) V3+ (D) VO2 2+ 6 . On heating ZnCl2 , 2H2O , the compounds obtained is (A) ZnCl2 (B) Zn(OH)Cl (C) Zn(OH)2 (D) ZnO 7. Zn reacts with cold and very dil HNO3 to give (A) NH4NO3 (B) N2O (C) NO (D) NO2 8. K2Cr2O7 , on heating gives (A) Cr2O3 (B) K2 CrO4 (C) O2 (D) All of these 9. When MnO2 is fused with KOH, a coloured compound is formed. The product and its colour is (A) K2MnO4 , green (B) Mn2O3 , brown (C) Mn2O4 , black (D) KMnO4 , Purple 10. Which one of the following does not give a precipitate with an excess of aqueous NaOH solution ? (A) ZnSO4 (B) CuSO4 (C) FeSO4 (D) MnSO4 11. Which one of the following is used in eye lotions? (A) AgNO3 (B) CuSO4 (C) ZnSO4 (D) FeSO4 12. Which one of the following is used in skin ointments ? (A) ZnO (B) CuO (C) FeO (D) Fe O2 3 .13 The waste solution from Kipps apparatus when evaporated and crystallized gives (A) ZnSO4 (B) FeSO4 (C) 2 4  3 Al SO (D) Na SO2 4 14. When CuSO4 is treated with excess of aq.KCN solution, the species formed is (A)   2 4 Cu CN      (B)   3 4 Cu CN      (C)  2 Cu CN (D) 2  2 Cu CN 15. The compound used in the qualitative and quantitative analysis of carbon and hydrogen in the organic compounds is (A) ZnO (B) FeO (C) Fe O2 3 (D) CuO 16. K CrO 2 4 is converted to K Cr O 2 2 7 by (A) 2 4 conc.H SO (B) KOH (C) K CO 2 3 (D) KNO3
NISHITH Multimedia India (Pvt.) Ltd., 225 JEE JEE MAINS - CW - VOL - I ADVANCED VOL - VII HEAVY METALS NISHITH Multimedia India (Pvt.) Ltd., 17. Litharge is (A) PbO (B) PbO2 (C) Pb O2 3 (D) Pb O3 4 18. The compound formed during golden yellow spangle test is (A) PbCl2 (B) PbCrO4 (C) PbS (D) PbI2 19. Which one of the following compounds is not stable ? (A) PbCl2 (B) PbI4 (C) 2 SnCl (D) 4 SnCl 20. A metal M and its compound can give the following observable changes in a consequence of reactions M dilute HNO3 Colourless solutions aqueous NaOH White Precipitate excess NaOH(aq) Colourless solution White H2S Precipitate (A) Mg (B) Pb (C) Zn (D) Sn 21. Which of the following can act as a good mordant? (A) 4 SnCl (B) 2 SnCl (C) PbCl2 (D) PbI4 MULTIPLE ANSWER QUESTIONS 22. Which of the following statment (s) is /are not correct (A) The blue colour of aqueous CuCl2 is due to   2 2 4 Cu H O      (B) The yellow colour of aqueous CuCl2 is due to   2 CuCl4  (C) The green colour of aqueous CuCl2 is due to the presence of both  2 4 Cu H O      and   2 CuCl4  (D) The blue colour of aqueous CuCl2 is due to   2 CuCl4  23. K4 [Fe(CN)6 ] is used to detect (A) Cu2+ (B) As3+ (C) Zn2+ (D) Fe3+ 24. CuSO4 reacts with KCN to form (A)  2 Cu CN (B) CuCN (C)   2 4 K Cu CN     (D)   3 4 K Cu CN     25. When NH4VO3 is heated (A) NH3 is formed (B) N2 is formed (C) V2O5 is formed (D) NH2VO2 is formed 26. Manganese ions(Mn2+) can be oxidised by Persulphate ions S2O8 2- according to the following half equations S2O8 2- + 2e- 2 4 2SO   Mn2+ +4H2O MnO 8H 5e 4       How many moles of S2O8 2- are required to oxidise 1 mole of Mn2+ ? (A) 2.5 (B) 2.0 (C) 11.0 (D) 0.4 27. When steam is passed over red hot iron, the substances formed are (A) Fe2O3 + H2 (B) Fe3O4 + H2 (C) FeO + H2 (D) FeO + H2 + O2 28. In the dichromate dianion (A) 4 Cr- O bonds are equivalent (B) 6 Cr-O bonds are equivalent (C) all Cr–O bonds are equivalent (D) 4 Cr-O bonds non-equivalent 29. CuSO4 .5H2O 0 1000 C 2 (solid)(gas)    A B O CuSO4 .H2O x CuSO4 bluish white white here (A) A = CuSO4 (B) A = CuO (C) B = SO2 (D) X = 2300C 30. 1.245 g of CuSO4 .xH2O was dissolved in water and H2 S was passed until CuS was completely precipitated. The H2 SO4 Produced in the filtrate required 10 ml of 1N NaOH solution. Calculate x. (A) 3 (B) 10 (C) 5 (D) 6
HEAVY METALS 226 NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED VOL - VII NISHITH Multimedia India (Pvt.) Ltd., 31. When ferrous sulphate is added to mercuric chloride then (A) HgCl2 is oxidised to HgCl4 (B) HgCl2 is reduced to Hg2 Cl2 (C) FeSO4 is oxidised to Fe2 (SO4 ) 3 (D) FeSO4 is oxidised to FeCl3 32. A metal M and its compound can give the following observable changes in a consequence of reactions the metal M is M dilute HNO3 Colourless solutions aqueous NaOH White Precipitate excess NaOH(aq) Colourless solution White H2S Precipitate (A) Mg (B) Pb (C) Zn (D) Sn 33. Copper ion forms blue coloured complex with ligand NH3 and a colourless complex with ligand. ‘B’ which has low dissociation constant than 2 Cu  with NH3 .Conc. of 2 Cu  can be estimated by titration using NH3 and B is (A) NH3 as a titrant and B as indicator (B) The end point with appearance of blue colour (C) Using ‘B’ as titrant and NH3 as indicator (D) The end point will correspond to first disappearance of colour 34. Which of the following is /are correct about Wilkinson’s catalyst? (A) It is used as homogeneous catalyst for selective hydrogenation of organic molecule at room temperatuer and pressure (B) It is tetrahedral complex (C) It does not have unpaired electrons (D) Its formula is TiCl4 + Al(C2H5 ) 3 35. Which of the following give O2 on strong heating? (A)KMnO4 (B)K Cr O 2 2 7 (C) AgNO3 (D) ZnO 36. K MnO 2 4 can be converted to KMnO4 by (A) Cl2 (B) O3 (C) CO2 (D) Anodic oxidation 37. The diamagnetic compounds is/are (A) HgCl2 (B) Hg Cl 2 2 (C) Cu Cl 2 2 (D) K Cr O 2 2 7 38. The compounds that liberate Cl2 on heating with conc.HCl is/are (A) PbO2 (B) Pb O3 4 (C) PbO (D) 2 SnO 39. Which of the following ions will give a colored precipitate with lead nitrate solution ? (A) 2 S  (B) 2 CrO4  (C) I  (D) 2 SO4  COMPREHENSION TYPE QUESTIONS Passage - I Light green (Compound ‘A’ )  White Residue (B) High Temp C + D + E i) ‘D’ and ‘E’ are two acidc gas. ii) ‘D’ is passed through HgCl2 solution to give yellow ppt. iii) ‘E’ is passed through water first and then H2 S is passed, white turbidity is obtained. iv) A is water soluble and addition of HgCl2 in it, white ppt is obtained but white ppt does not turn into grey on addition of excess solution of ‘A’. 40. ‘D’ and ‘E’ are respectively (A) SO2 and SO3 (B) SO3 and SO2 (C) SO2 and CO2 and conc. CH3 COOH (D) CO2 and CO Boiled conc. HCl 41. Yellow ppt in the above observation is (A) Mercuric oxide (B) Basic mercury (II) sulphite (C) Basic mercury (II) sulphate (D) Mercuric iodide
NISHITH Multimedia India (Pvt.) Ltd., 227 JEE JEE MAINS - CW - VOL - I ADVANCED VOL - VII HEAVY METALS NISHITH Multimedia India (Pvt.) Ltd., 42. ‘C’ is soluble in (A) dil. HCl (B) dil. H2 SO4 (C) conc. CH3 COOH (D) Boiled conc. HCl 43. The no. of water of crystallisation in ‘A’ is (A) 0 (B) 2 (C) 7 (D) 5 Passage - II   2 gas brown fumes X Y Z O     3 lub dil HNO Y so le  44. Solution of Y in 2 4 ; 3 Add Na Cro HNO A red ppt  is obtained X is (a)   3 2 Pb NO (b) Ag NO3 (c)   3 2 Ba NO (d)   3 2 Hg NO 45. X on reaction with little hypo forms. (a) PbS O2 3 (b) Ag S O 2 2 3 (c) BaS O2 3 (d) CaS O2 3 Passage - III      A B C D Purple Green Black Gas    46. Wrong statement is (a) Black compound ‘C’ is MnO2 (b) D is Cl2 (c) The oxidation state of the d-block metal in A is +7 (d) The oxidation state of the d-block metal in B is +7 47. B cannot be converted to A by (a) KOH (b)CO2 (c) Cl2 (d) O3 STATEMENT TYPE QUESTIONS (A) Statement – 1 is True, Statement – 2 is True; Statement – 2 is a correct explanation for Statement – 1. (B) Statement – 1 is True, Statement – 2 is True; Statement – 2 is NOT a correct explanation for Statement – 1. (C) Statement – 1 is True, Statement – 2 is False. (D) Statement – 1 is False, Statement – 2 is True. 48. Statement – 1: K2 CrO4 has yellow colour due to charge transfer because Statement – 2: CrO4 2- ion is tetrahedral in shape. 49. Statement – 1: Silver chloride dissolves inexcess ammonia because Statement – 2:: AgCl forms a soluble complex, [Ag(NH3 ) 2 ] Cl with ammonia 50. Statement – 1: KMnO4 is purple in colour due to charge transfer because Statement – 2: There is no electron present in d-orbitals of manganes in MnO4  MATRIX MATCHING QUESTIONS 51. Match the following: Compound Related to (A) AgNO3 (p) Tyres and Paint Manufacturing (B) Hg Cl 2 2 (q) Calomel (C) ZnO (r) Corrosive sublimate (D) HgCl2 (s) Photography (t) Marking Inks 52. Match the following: Compound Characteristics (A) Litharge (p) PbO (B) Red lead (q) PbO2 (C) Purple of Cassius (r)  4 6    2 NH SnCl (D) Butter of tin (s) Au adsorbed over  4 Sn OH (t) Anode plate in lead accumulator