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Chemical Bonding and Molecular Structure

Short Answer Type

241.

Give the reason for the following: Bond order in N₂ is 3 whereas it is 2.5 in NO ?

223 Views

Long Answer Type

242.

Give the points of resemblance and points of difference between valence bond theory and molecular orbtial theory.

120 Views

243.

What is hydrogen bond? How is it formed?

137 Views

Short Answer Type

244.

What are the conditions for hydrogen bonding ?

126 Views

245.

Water is a liquid while hydrogen sulphide is a gas. Explain.

119 Views

246.

Out of NH₃ and PH₃, which has higher boiling point and why?

127 Views

247.

Nitrogen and chlorine have the same electronegativity but only former shows intermolecular hydrogen bonding. Discuss.

113 Views

Long Answer Type

248.

What are the types of hydrogen bonding? Give examples.

143 Views

Short Answer Type

249.

What are the conditions for the formation of intramolecular hydrogen bonding?

200 Views

250. O-Nitrophenol is steam volatile, while p-nitrophenol is not. Explain.
Or
Boiling point of o-nitrophenol is less than p-nitrophenol. Explain.

In o-nitrophenol, intramolecular hydrogen bonding is present while intermolecular hydrogen bonding is present in the molecules of p-nitrophenol. Energy is required to overcome attractive forces in the molecules of p-nitrophenol but no such energy is needed in case of molecules in o-nitrophenol. This means that the boiling point of o-nitrophenol is less and is steam volatile while that of p-nitrophenol is more and is, therefore, non-volatile in steam.