JEE MAIN - Chemistry (2023 - 15th April Morning Shift - No. 10)
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:
(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:
(C) and (D) are correct
(A) and (B) are correct
(B) and (C) are correct
(A) and (D) are correct
Explanation
The correct answer is (B) and (C).
(A) NF3 molecule has a trigonal pyramidal structure, not a trigonal planar structure. Therefore, statement (A) is false.
(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.
(C) Isoelectronic molecules or ions have the same number of electrons and hence the same bond order. Therefore, statement (C) is true.
(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.
(A) NF3 molecule has a trigonal pyramidal structure, not a trigonal planar structure. Therefore, statement (A) is false.
(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.
(C) Isoelectronic molecules or ions have the same number of electrons and hence the same bond order. Therefore, statement (C) is true.
(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.
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