LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What property of water molecules causes surface tension and cohesion?
A
Covalent bonds
B
Bent shape
C
All non-metal atoms
D
Polarity
Explanation: 

Detailed explanation-1: -Water molecules have strong cohesive forces due to their ability to form hydrogen bonds with one another. Cohesive forces are responsible for surface tension, the tendency of a liquid’s surface to resist rupture when placed under tension or stress.

Detailed explanation-2: -Surface tension in water owes to the fact that water molecules attract one another, as each molecule forms a bond with the ones in its vicinity.

Detailed explanation-3: -Water molecules are polar, so they form hydrogen bonds. This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion and density.

Detailed explanation-4: -The polarity of water molecules allows liquid water to act as a “universal solvent, ‘’ able to dissolve many ionic and polar covalent compounds. The polarity of water molecules also results in strong hydrogen bonds that give rise to phenomena such as surface tension, adhesion, and cohesion.

Detailed explanation-5: -The polarity of water molecules means that molecules of water will stick to each other. This is called hydrogen bonding. Polarity makes water a good solvent, gives it the ability to stick to itself (cohesion), stick to other substances (adhesion), and have surface tension (due to hydrogen bonding).

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