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The molecules BF3 and NF3 are covalent ...

The molecules `BF_3` and `NF_3` are covalent compounds. But `BF_3` is non-polar and `NF_3 ` is polar. The reason is

A

Boron is a metal and nitrogen is a gas in uncombined state

B

BF bonds have no dipole moment where as NF bonds have dipole moment

C

Atomic size of boron is smaller that that of nitrogen

D

`BF_3 ` is planar but `NF_3` is pyramidal in shape

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The correct Answer is:
D
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AAKASH SERIES-CHEMICAL BONDING-OBJECTIVE EXERCISE-2B
  1. Which of the following has a net dipole moment ?

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  2. Which of the following will have zero dipole moment?

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  3. The molecules BF3 and NF3 are covalent compounds. But BF3 is non-pol...

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  4. Which of the following has highest dipole moment?

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  5. BeF2 has zero dipole moment where as H2 Ohas a dipole moment because

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  6. Molecule with dipole moment among the following

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  7. Which of the following has highest dipole moment?

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  8. A molecule MX3 has zero dipole moment. The % of's' character in the h...

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  9. A diatomic molecule has a dipole moment 1.2D. If the internuclear dist...

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  10. The C-H bond distance is largest in

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  11. In compounds of type ECl3, where E = B, P, As or Bi, the angles CI-E -...

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  12. The geometry of H(2)S and its dipole moment are

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  13. In O(2), H(2)O(2) and O(3) the correct order of oxygen -oxygen bond le...

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  14. The correct order of bond lengths is

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  15. Bone energy is least in the following

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  16. Which of the following statements is incorrect ?

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  17. Bond length of H2 is 0.074nm, Bond length of Cl2 is 1.98A^@. Bond leng...

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  18. Average C-H energy is 416 KJ.mol^(-1) Which of the following is correc...

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  19. The decreasing order of bond dissociation energies of C-C, C-H and H-H...

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  20. The highest dipolemoment is of

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