Q9 of 26 Page 1

(i) Write down the IUPAC name of the following complex: K3[Fe(CN)6]

(ii) Write the formula for the following complex: Pentaamminenitrito-N-cobalt(III)


(i) IUPAC name of the given complex is Potassium hexacyanoferrate(III).


(ii) Formula for the given complex is [Co(NH3)5(NO2)]2+. (Ammine is a neutral ligand whereas nitrito-N have -1 oxidation state.)


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7

(i) Why do actinoids show wide range of oxidation states?

(ii) Why is actinoid contraction greater than lanthanoid contraction?


 8

Calculate the time to deposit 1.17 g of Ni at cathode when a current of 5 A was passed through the solution of Ni(NO3)2. (Molar mass of Ni = 58.5 g/mol, 1 F = 96500 C/mol)

 10

(i) On mixing liquid X and liquid Y, the volume of the resulting solution increases. What type of deviation from Raoult’s law is shown by the resulting solution? What change in temperature would you observe after mixing liquids X and Y?

(ii) How can the direction of osmosis be reversed? Write one use of reverse osmosis.


 11

(i) Which one of the following is an oligosaccharide: starch, maltose, fructose, glucose

(ii) Write one difference between DNA and RNA.


(iii) Write the name of the disease caused by the deficiency of Vitamin B1.