Question

In how many of the following molecules, all atoms are in same plane?

$Cl{F}_3$	$H_{2}O$	$PC{l}_3$	$B{F}_3$
$S{F}_4$	$H_{2}S$	$OC{l}_2$	$S{O}_3$
$Xe{F}_6$	$N{H}_3$	$C_6{H}_6$	$Xe{F}_2$
$Xe{F}_4$	$PC{l}_5$	$I_{2}C{l}_6$	$P{H}_3$

• A. 12
• B. 0
• C. 10
• D. 11

Answer 1

Answer: (C)

Planar molecules

$Cl{F}_3,Xe{F}_4,H_{2}O,H_{2}S,OC{l}_2,C_6{H}_6,I_{2}C{l}_6,B{F}_3,S{O}_3,Xe{F}_2$

$Cl{F}_3\to$ Central atom $Cl$ has $2.lp+3Bp=s{p}^{3}d$ hybridised it is T-shape (planar)

$H_{2}O\to$ Central atom $O-$ has $2lp+2Bp=s{p}^3$ hybridised (angular)( planar)

$PC{l}_3\to$ Central atom $P-$ has $1lp+3p\to s{p}^3$ hybridised pyramidal (non planar)

$B{F}_3\to s{p}^2$ hybridised $\to$ triagonal planar (planar)

$S{F}_4\to CentralatomS$ has $\left(1lp+4Bp\right),s{p}^{3}d$ hybridised see-saw structure (non planar)

$H_{2}S\to CentralatomS$ has $2lp+2bp$ angle between $H-\overbrace{S}H$ is $90^{\circ }$ (planar)

$OC{l}_2\to CentralatomO-$ has $2lp+2bp$ ; angular shape (planar)

$S{O}_3\to s{p}^2$ hybridised, triangonal (planar)

$Xe{F}_6\to 6Bp-s{p}^3{d}^2$ hybridised/ square bipyramidal (non-planar)

$N{H}_3\to 1lp+3Bp\to s{p}^3$ hybridised ( pyramidal (non-planar)

$C_6{H}_6\to$ in benzene all $C-$ atoms are $s{p}^2$ and planar molecule.(planar)

$Xe{F}_2\to 3lp+2Bp;-s{p}^{3}d$ hybridised ,linear shape(planar).

$Xe{F}_4\to 1lp+4Bp\to s{p}^{3}d$ hybridised structure see-saw (non-planar)

$PC{l}_5\to 5Bp\to s{p}^{3}d$ hybridised TBP (non-planar)

$I_{2}C{l}_6\to$

dimer (planar)

$P{H}_3\to 1lp+3Bp\to s{p}^3$ hybridised/ pyramidal (non-planar)