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The P-Block Elements

Question

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NO₂ is coloured but its dimer N₂O₄ is colourless. Why?

Solution

NO₂ has unpaired electron and due to this it has brown colour. Whereas N₂O₄ has no unpaired electro thus it is colorless.

Some More Questions From The p-Block Elements Chapter

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.

Why is H₂O a liquid and H₂S a gas?

Which of the following does not react with oxygen directly?
Zn, Ti, Pt, Fe

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