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The P-Block Elements

Question
CBSEENCH12011134
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Which one of the following molecules contains no pi -bond?

  • CO2

  • H2O

  • SO2

  • NO2

Solution

B.

H2O

All the molecules have O atom with lone pairs, but in H2O the H atom has no vacant orbital for pi-bonding. That's why it does not have any pi- bond.
 
In all other given molecules, the central atom because of the presence of vacant orbitals is capable to farm Pi- bonds.

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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