Question

Molecular formulae and shapes of some molecules are given below. Choose the incorrect match

	Formula	Shape
A	$NH_3$	Trigonal pyramidal
B	$SF_4$	Tetrahedral
C	$ClF_4$	T - shaped
D	$PCl_5$	Trigonal bipyramidal
E	$BF_3$	Trigonal planar

• A. A
• B. B
• C. C
• D. D
• E. E

Answer 1

Answer: (B)

$NH _{3} \Rightarrow 3\, b p+1\, l p=$ trigonal pyramidal

$SF _{4} \Rightarrow 4 \, bp+1\, l p \Rightarrow $ see-saw shape

$ClF _{5} \Rightarrow 3 \, b p+2\, l p \Rightarrow T$ -shaped

$PCl _{5} \Rightarrow 5\, b p+0\, l p \Rightarrow $ trigonal bipyramidal

$BF _{3} \Rightarrow 3 \, b p+0 \, l p \Rightarrow $ trigonal planar

Thus, the given shape of $S F_{4}$ is incorrect.