Consider the following statements:
(A) NF3 molecule has a trigonal planar structure.
(B) Bond length of $\mathrm{N}_{2}$ is shorter than $\mathrm{O}_{2}$.
(C) Isoelectronic molecules or ions have identical bond order.
(D) Dipole moment of $\mathrm{H}_{2}\mathrm{S}$ is higher than that of water molecule.
Choose the correct answer from the options given below:
Solution
The correct answer is (B) and (C).
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(A) NF<sub>3</sub> molecule has a trigonal pyramidal structure, not a trigonal planar structure. Therefore, statement (A) is false.
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(B) The bond length of $\mathrm{N}_{2}$ is shorter than that of $\mathrm{O}_{2}$ due to the smaller atomic radius of nitrogen compared to oxygen. Therefore, statement (B) is true.
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(C) Isoelectronic molecules or ions have the same number of electrons and hence the same bond order. Therefore, statement (C) is true.
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(D) The dipole moment of water ($\mathrm{H}_{2}\mathrm{O}$) is higher than that of $\mathrm{H}_{2}\mathrm{S}$ due to the greater electronegativity of oxygen compared to sulfur. Therefore, statement (D) is false.
About this question
Subject: Chemistry · Chapter: Chemical Bonding and Molecular Structure · Topic: Ionic and Covalent Bonding
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