Question

Which set of molecules is polar ? 1. XeF4, IF7 , SO3 2. PCl5, C6H6 , SF6
3. SnCl2, SO2, NO2 4. CO2 , CS2 , C2H6

Answer 1

Explanation:

pcl5,sf6,sncl2,

so3,

Answer 2

Answer:

A molecule's shape determines whether it is polar or nonpolar. A molecule is polar if one end of the molecule has a positive charge and the other end has a negative charge. The molecule is nonpolar if a charge is uniformly distributed around a center atom.

Explanation:

1) XeF₄, IF₇, SO₃

• XeF₄ is square bipyramidal in geometry.
• IF₇ is pentagonal bipyramidal in geometry.
• SO₃ is trigonal pyramidal in geometry.
• These molecules are nonpolar because they are symmetrical molecules.

2) PCl₅, C₆H₆, SF₆

• PCl₅ is trigonal bipyramidal in geometry.
• C₆H₆ is planar in geometry.
• SF₆ is octahedral.
• These molecules are nonpolar because they are symmetrical molecules.

3) SnCl₂, SO₂, NO₂

• SnCl₂ is trigonal pyramidal in geometry.
• SO₂ has a bent geometry.
• NO₂  has bent geometry.
• These molecules are polar because they all are nonsymmetrical molecules.

4) CO₂, CS₂, C₂H₆

• CO₂ has linear geometry.
• CS₂ has linear geometry.
• C₂H₆ has linear geometry.
• These molecules are nonpolar as they are symmetrical molecules

Hence, the set of molecules which is polar is (3).

The correct option is (3)  SnCl₂, SO₂, NO₂.

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