Structure and polarity

Front

What is the Lewis structure for water (H₂O)?

Back

The correct Lewis structure for water shows two hydrogen atoms bonded to one oxygen atom, with two lone pairs of electrons on the oxygen.

Front

Is water (H₂O) a polar or non-polar molecule?

Back

Water (H₂O) is a polar molecule due to the difference in electronegativity between oxygen and hydrogen, leading to a partial negative charge on oxygen and partial positive charges on hydrogen.

Front

Which of the following represents a polar molecule: H₂, H₂O, CO₂, CCl₄?

Back

H₂O is the polar molecule among the options.

Front

What is the molecular geometry of a molecule with 3 atoms bonded and 0 lone pairs?

Back

The molecular geometry is trigonal planar.

Front

Is carbon dioxide (CO₂) a polar or non-polar molecule?

Back

Carbon dioxide (CO₂) is a non-polar molecule because of its symmetrical linear shape, which cancels out the dipole moments.

Front

Define polarity in molecules.

Back

Polarity refers to the distribution of electrical charge over the atoms in a molecule, leading to regions of partial positive and negative charge.

Front

What is a non-polar molecule?

Back

A non-polar molecule is one that has an even distribution of charge, resulting in no distinct positive or negative poles.

Front

What is the significance of electronegativity in determining molecular polarity?

Back

Electronegativity is the ability of an atom to attract electrons; differences in electronegativity between bonded atoms can create polar bonds.

Front

What is the shape of a molecule with 2 bonded atoms and 2 lone pairs?

Back

The shape is bent (or angular) due to the repulsion of the lone pairs.

Front

What is the molecular geometry of a molecule with 4 bonded atoms and 0 lone pairs?

Back

The molecular geometry is tetrahedral.