Q8 of 26 Page 1

(a) Write the IUPAC name of the isomer of the following complex: [Pt(NH3)2Cl2]

(b) Write the formula for the following: Tetraammineaquachloridocobalt(III) nitrate


(a) The IUPAC names of the isomers of the complex are


cis- diamminedichloridoplatinum(II) and


trans- tiamminedichloridoplatinum(II)


(b) The formula for Tetraammineaquachloridocobalt(III) nitrate is [Co(NH3)4(H2O)Cl](NO3)2


The total oxidation no. of cationic part will be 3+0+0+(-1) = 2


(Since, NH3 i.e. ammineand H2O i.e. aqua are neutral ligands)


And the anionic part consists of NO3-. Therefore, the formula of complex is [Co(NH3)4(H2O)Cl](NO3)2.


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6

Do the following conversions in not more than two steps:

(a) Propene to Acetone


(b) Propanoic acid to 2-hydroxypropanoic acid


OR


Write the reaction involved in the following:


(a) Etard reaction


(b) Wolff-Kishner reduction


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What are colligative properties? Write the colligative property which is used to find the molecular mass of macromolecules.

 9

In a galvanic cell, the following cell reaction occurs:

Zn(s) + 2Ag+(aq) → Zn2+(aq) + 2Ag(s), E°cell = +1.56 V


(a) Is the direction of flow of electrons from zinc to silver or silver to zinc?


(b) How will concentration of Zn2+ ions and Ag+ ions be affected when the cell functions?


 10

In the following ions: Mn3+, V3+, Cr3+, Ti4+ (Atomic no.: Mn=25, V=23, Cr=24, Ti=22)

(a) Which ion is most stable in an aqueous solution?


(b) Which ion is the strongest oxidizing agent?


(c) Which ion is colorless?


(d) Which ion has the highest number of unpaired electrons?