The number of lone pairs of electrons present on : Xe in XeF₄ is

• 3

• 4

• 1

• 2

Which one of the following ions exhibits highest magnetic moment ?

• Cu²⁺

• Ti³⁺

• Ni²⁺

• Mn²⁺

Which of the following statements is true?

• Hybridisation of the central atom in NH₃ and CH₄ is sp²

• BeCl₂ has V shape while SO₂ is linear

• SF₆ is octahedral and F-S-F bond angle is 90°

• CO₂ has dipole moment

Bond dissociation energies of HF, HCl, HBr follow the order

• HCl > HBr > HF

• HF > HBr > HCl

• HF > HCl > HBr

• HBr > HCl > HF

Which one ofthe following is a correct set?

• H₂O, sp³, angular

• H₂O, sp², linear

• NH₄⁺, dsp²,square planar

• CH₄, dsp², tetrahedral

The bond energies (in kJ mol^-1) of P-H; As- H and N-H are respectively

• 247, 389 and 318

• 247, 389 and 318

• 318, 389 and 247

• 318, 247 and 389

The calculated magnetic moment (in Bohr magnetons of Cu²⁺ ion is)

• 1.73

• zero

• 2.6

• 3.4

Which one of the following molecules contain both ionic and covalent bonds?

• CH₂Cl₂

• K₂SO₄

• BeCl₂

• SO₂

What is the hybridization state of the central atom in the conjugate base of NH${}_4^{+}$ ion?

• sp

• sp³

• sp²

• dsp²

440.

If the bond length and dipole moment of a diatomic molecule are 1.25 A and 1.0 D respectively, what is the percent ionic character of the bond ?

• 10.66

• 12.33

• 16.66

• 19.33