a, What are inter-halogen compounds? Give any two example. b. The number of electrons 'in the valence shell decides the oxidation state of an element What are the possible oxidation states of Pb? Atomic number of 'Pb=82' Which is more stable? Why?

Explanation

a. Halogens. can react themselves to form binary compounds known as inter halogen compounds. There are 4 types of interhalogen compounds such as AX. .AX_3^* AX_s, AX_2., Interalogeri cōmpounds
are more reactive than halogen.s because of the difference in the electronegativity of the combining halogen atoms. .Eg: ClF_3 * IF, BrF_3. etc.
b. .P b. exhibits .+2. and .+4., oxidation states. .angle angle. Amdng these. .+2. oxidation state is more stable than .+4 .. This .is due to inert pair effect. The electronic configuratión of .Pb.
in the outermost shell do not take part in bond formation: Sịnce only.the . 6 p electrons are, involyed in bond formation, the .+2. oxidation štate is more stable than .+4.