41
Which of the following species has maximum number of lone-pair of electrons on the central atom ?
Answer: XeF2
Questions
42
PCl5 is highly unstable and in solid state it exists as into [PCl4]+ and [PCl6]- ions.
The geometry of [PCl6]- is
Answer: octahedral
43
In an octahedral structure, the pair of d orbitals involved in d2sp3-hybridisation is
Answer: dx2−y2, dz2
45
The dielectric constant of H2O is 80. The electrostatic force of attraction between Na+ and Cl- will be
Answer: reduced to 1/80 in water than in air
46
The correct order of C-O bond length among CO, CO2−3, CO2 is
Answer: CO < CO2 < CO2−3
47
In which one of the following molecules, the central atom said to adopt sp2 hybridisation ?
Answer: C2H2
48
In which of the following pairs, the two species are isostructural ?
Answer: BrO−3 and XeO3
49
In BrF3 molecule, the lone pairs occupy equatorial positions to minimise :
Answer: lone pair-lone pair repulsion
50
In which of the following species the central atom has the type of hybridisation which is not the same as that present in the other three ?
Answer: SbCl2−5
51
In which of the following molecules are all the bonds not equal ?
Answer: ClF3
