Q22 of 26 Page 1

(a) Write the formula of the following coordination compound : Iron(III) hexacyanoferrate (II)

(b) What type of isomerism is exhibited by the complex


(c) Write the hybridisation and number of unpaired electrons in the complex [CoF6 ]3- . (Atomic No. of Co = 27)

(a) The molecular formula for coordination compound Iron(III) hexacyanoferrate(II)

Fe4[ Fe (CN )6]3


(b) [Co(NH3)5 Cl]SO4 will show ionisation isomerism, and the possible isomers are


[Co(NH3)5Cl]SO4 and [Co(NH3)5 SO4] Cl


(c) Electronic configuration of Co3+ ions is sp3d3 hybridized orbitals of Co3+, with six pairs of electrons from six F- ions.


Hybridisation = sp 3d 3


Number of unpaired electron = 4


There are 4 unpaired electron in [CoF6]3+


More from this chapter

All 26 →
20

(a) Why is bithional added to soap?

(b) What is the tincture of iodine ? Write its one use.


(c) Among the following, which one acts as a food preservative ?


Aspartame, Aspirin, Sodium Benzoate, Paracetamol

 21

Define the following with an example of each :

(a) Polysaccharides


(b) Denatured protein


(c) Essential amino acids


OR


(a) Write the product when D-glucose reacts with conc. HNO3.


D-glucose + HNO3→


(b) Amino acids show amphoteric behaviour. Why?

 23

Shyam went to a grocery shop to purchase some food items. The shopkeeper packed all the items in polythene bags and gave them to Shyam. But Shyam refused to accept the polythene bags and asked the shopkeeper to pack the items in paper bags. He informed the shopkeeper about the heavy penalty imposed by the government for using polythene bags. The shopkeeper promised that he would use paper bags in future in place of polythene bags.

Answer the following :


(a) Write the values (at least two) shown by Shyam.


(b) Write one structural difference between low-density polyethene and high-density polyethene.


(c) Why did Shyam refuse to accept the items in polythene bags ?


(d) What is a biodegradable polymer? Give one example?

 24

(a) Give reasons:


(i) H3PO3 undergoes disproportionation reaction, but H3PO4 does not.


(ii) When Cl2 reacts with an excess of F2. ClF3 is formed and not FCl3.


(iii) Dioxygen is a gas while Sulphur is a solid at room temperature.


(b) Draw the structures of the following:


(i) XeF4


(ii) HCLO3


OR


(a) When concentrated sulphuric acid was added to n unknown salt present in a test tube a brown gas(A) was evolved. This gas intensified when copper turning were added to this test tube . On cooling, the gas (A) changed int a colourless solid(B).


(i) Identify (A) and (B).


(ii) Write the structures of (A) and (B).


(iii) Why does gas (A) change to solid on cooling?


(b) Arrange the following in the decreasing order of theirreducing character:


HF, HCl, HBr, HI


(c) Complete the following reaction:


XeF4 +SbF5→