AP EAMCET · Chemistry · Chemical Bonding and Molecular Structure
Which of the following orders are correct against the property given?
\(\begin{array}{lll} \hline \text { (I) } & \text { Dipole moment } & \mathrm{NF}_3 > \mathrm{NH}_3 > \mathrm{BF}_3 \\ \hline \text { (II) } & \text { Covalent bond length } & \mathrm{C}-\mathrm{O} > \mathrm{N}-\mathrm{O} > \mathrm{O}-\mathrm{H} \\ \hline \text { (III) } & \text { Bond order } & \mathrm{C}_2 > \mathrm{B}_2 > \mathrm{He}_2 \\ \hline \end{array}\)
- A I, II only
- B II, III only
- C I, III only
- D I, II, III
Answer & Solution
Correct Answer
(B) II, III only
Step-by-step Solution
Detailed explanation
(I) In \(\mathrm{BF}_3\), electronegativity of \(\mathrm{F}\)-atom is greater than \(B\). In \(\mathrm{NH}_3\), electronegativity of \(\mathrm{N}\)-atom is greater than \(\mathrm{H}\). Therefore, direction of all dipole moment with lone pairs lies in same direction, hence net…
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