EKLAVYA EDUCATION

  CORDINATION CHEMISTRY; SOME IMPORTANT QUESTION      XII-BOARD 2013                                                                                        MM=35                                                                              TIME =60 MIN   Question = 1 -6 (1-marks),,7-17(2-marks),,18-20 (3-marks) Q1 . Write the formula for the following coordination compound: Tetraamineaquachloridocobalt (III) chloride Q2 . Why is geometrical isomerism not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion? Q3 . Write the IUPAC name of the following coordination compound: [CoCl 2 (en) 2 ]Cl. Q4. The spin only magnetic moment of [MnBr 4 ] 2- is 5.9 BM. Predict the geometry of the Complex ion? Q5 . Out of the following two coordination entities which is chiral (optically active)? (a)   cis ‐[CrCl 2 (ox) 2 ] 3- (b) trans ‐[CrCl 2 (ox) 2 ] 3- Q6 . [NiCl 4 ] 2

D-BLOCK,SURFACE CHEMISTRY,AND BIO MOLECULE                                                                              MM=35,,TIME=60 MIN Instruction--- 1 Question carry 5 marks while 2-4carry 1 marks. While 5-10 of 2 marks and 11-15 of 3 marks each respectively. Q1-Complete the following reaction….. (1)     Fe 3+ + SO 2    +H 2 O                               ---------------------- (2)     3K 2 Mn O 4 +4HCl                      ------------------------------ (3)     FeO   + SiO 2                                                    ----------------------------------- (4)     Cr 2 O 7 2-        +3SO 2     +8H +             ---------------- (5)     Ag 2 s      +4NaCN                          ------------------------ Q2- Write all the chemical reaction which take place during t he preparation   of KmnO 4   AND K 2 Cr 2 O 7. ? Q3-Define hardy –schulze rule.? Q5-Why all scandium salt are white.? Q6-Why KmnO 4 is coloured.? Q7-(1)What are Lanthanoid cont