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Consider the following statement (A) NF3 molecules has a trigonal planar structure. (B) Bond length of N2 is shorter than O2 (C) Isoelectronic molecules or ions have identical bond order. (D) Dipole moment of H2S is higher than that of water molecule. Choose the correct answer from the options given below :

1. (1) (A) and (B) are correct
2. (2) (A) and (D) are correct
3. (3) (C) and (D) are correct
4. (4) (B) and (C) are correct

Correct answer: (4) (B) and (C) are correct

Solution

Option (B) is correct because the bond length of N2 is indeed shorter than that of O2 due to the triple bond in N2 compared to the double bond in O2, resulting in stronger bonding. Option (C) is also correct as isoelectronic species, having the same number of electrons, typically exhibit similar bond orders.

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