NEET

Among the following the pair in which the two species are not isostructural is

SiF₄ and SF₄
IO₃^- and XeO₃
BH4^- and NH4⁺
PF₆^- and SF₆

Solution

In NO₃^– ion number of bond pair and lone pair of electrons on nitrogen atom respectively are

2, 2
3, 1
1, 3
4, 0

Solution

Fluorine molecule is formed by

the axial p- p orbital overlap
the sideways p - p orbital overlap
the s - s orbital overlap
the s - p orbital overlap

Which one of the following has the pyramidal shape?

CO₃^2–
SO₃
BF₃
PF₃

Solution

PF₃ has pyramidal shape. Phosphorus exist in sp³ hybridization state hence it exist in tetrahedral shape.But due to presence of lone pair its shape is pyramidal.

Hybridization present in CIF₃ is:

sp²
sp³
dsp²
sp³d

Solution

The decreasing values of bond angles from NH₃(106º) to SbH₃(101º) down group-15 of the periodic table is due to

decreasing lp-bp repulsion
decreasing electronegativity
increasing bp-bp repulsion
increasing lp-bp repulsion

Solution

Bond order in benzene is:

1
2
1.5
none of these

Solution

A-5, B-4, C-3, D-2, E-1
A-5, B-3, C-4,D-2, E-1
A-5, B-3, C-4, D-1, E-2
A-4, B-3, C-5,D-2, E-1

Solution

In BrF₃ molecule, the lone pairs occupy equatorial positions to minimize

lone pair - bond pair repulsion only
bond pair - bond pair repulsion only
lone pair - lone pair repulsion and lone pair - bond pair repulsion
lone pair- lone pair repulsion only

Solution

In BrF₃, both bond pairs as well as lone pairs of electrons are present. Due to the presence of lone pairs of electrons (lp) in the valence shell, the bond angle is contracted and the molecule takes the T-shape. This is due to greater repulsion between two lone pairs or between a lone pair and a bond pair than between the two bond pairs.

Which one of the following does not follow octate rule?

PF₃
BF₃
CO₂
CCl₄

Solution

UnAttempted

0

Attempted

0

Correct

0

Wrong

0

Attempted

Correct

UnAttempted

Wrong