NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

BIO MOLECULES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A water molecule is a ____ molecule, which has one end where the oxygen is located that has a ____ charge and two hydrogens at the other end that that have a ____ charge.
A
non-polar, positive, negative
B
polar, positive, negative
C
polar, negative, positive
D
non-polar, negative, positive
Explanation: 

Detailed explanation-1: -The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles-a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side).

Detailed explanation-2: -Hydrogen bonding of water molecules The plus end of one-a hydrogen atom-associates with the minus end of another-an oxygen atom. These attractions are an example of hydrogen bonds, weak interactions that form between a hydrogen with a partial positive charge and a more electronegative atom, such as oxygen.

Detailed explanation-3: -Because oxygen and hydrogen attract the shared electrons unequally, each end of the V-shaped H2O molecule adopts a slightly different charge. The area around the oxygen is somewhat negative compared to the opposite, hydrogen-containing end of the molecule, which is slightly positive.

Detailed explanation-4: -The oxygen is the negative end of the molecule, while the area between the hydrogen atoms is the positive end of the molecule.

Detailed explanation-5: -In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

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