d- BLOCK SURFACE AND BIOMOLECULES

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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 2O                             ----------------------
(2)    3K 2Mn O4 +4HCl                     ------------------------------
(3)    FeO  + SiO2                                                  -----------------------------------
(4)    Cr 2O 72-       +3SO 2    +8H +           ----------------
(5)    Ag 2s     +4NaCN                         ------------------------
Q2- Write all the chemical reaction which take place during t he preparation  of KmnO 4  AND K 2 Cr 2O7.?
Q3-Define hardy –schulze rule.?
Q5-Why all scandium salt are white.?
Q6-Why KmnO 4 is coloured.?
Q7-(1)What are Lanthanoid contraction.why it is less then actinod contraction?
        (2)What happen when glucose react with hydroxy amine?


                 (II) Mn  ,    Zn    ,Pt     ,      Cu    , Cr        Sc   (all in +3) oxidation state …which is /are coloured ?
                                            BY – DR SUDHIR TOMAR

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