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The P-Block Elements

Question
CBSEENCH12010234
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State reasons for each of the following: 

(i) All the P-Cl bonds in PCl5 molecule are not equivalent. 

(ii) Sulphur has a greater tendency for catenation than oxygen.

Solution

(i) In gaseous and liquid state, PCl5 has a trigonal bipyramidal structure. In this structure, the two axial P-Cl bonds are longer and less stable than the three equatorial P-Cl bonds. This is because of the greater bond pair - bond pair repulsion in the axial bonds. Hence, all the bonds in PCl5 are not equivalent. 

(ii) Because of stronger S-S bonds as compared to O-O bonds, sulphur has a greater tendency for catenation than oxygen.

Some More Questions From The p-Block Elements Chapter

What is the covalency of nitrogen in N2O5?

Bond angle in PH4+ is higher than that in PH3. Why?

Write a balanced equation for the hydrolytic reactions PCl5 in heavy water.

What is the basicity of H3PO4?

What happens when H3PO3 is heated?

List the important source of sulphur.

Write the order of thermal stability of the hydrides of Group 16 elements.

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