Which molecules are polar? 1. F2 2. SiF2Cl2 3. SF4 3 only 1, 2 and 3...

Which molecules are polar?

1. F₂
2. SiF₂Cl₂
3. SF₄

	3 only
	1, 2 and 3
	1 only
	2 only
	2 and 3

Expert Solution

Polarity in molecules is due to a difference in electronegativity between the bonded atoms. It can be determined from lewis structure

F2 : the bonding atoms of F2 are the same hence there is no electronegativity difference between the atoms. No poles are formed and electron pair lie exactly in the middle of the two atoms.

SiF2Cl2: the lewis structure of SiF2Cl2

no lone pair with Si

and no dipole moment

Hence SiF2Cl2 is non polar

SF4: there are 2 lone pair on S in the structure causes a see-saw structure

2 polarity of F molecules get cancel out

but 2 causes negative polarity

hence SF4 is polar

the answer is "3 only"

queen_honey_blossom answered 2 years ago

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Which molecules are polar? 1. F2 2. SiF2Cl2 3. SF4 3 only 1, 2 and 3...

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