AP BIOLOGY

BIOCHEMISTRY

PROPERTIES OF WATER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following will cause water to change to ice?
A
adding salt to the water
B
removing heat from the water
C
stirring the water
D
putting the water in sunlight
Explanation: 

Detailed explanation-1: -Water can exist as a solid (ice), liquid (water) or gas (vapour or gas). Adding heat can cause ice (a solid) to melt to form water (a liquid). Removing heat causes water (a liquid) to freeze to form ice (a solid).

Detailed explanation-2: -So when water is solidified into ice, this process is known as Freezing. During freezing, the energy is gained by the surrounding molecules as water loses its energy. Thus, in this process, the heat is liberated.

Detailed explanation-3: -We can change a solid into a liquid or gas by changing its temperature. This is known as changing its state. Water is a liquid at room temperature, but becomes a solid (called ice) if it is cooled down. The same water turns into a gas (called water vapor) if it is heated up.

Detailed explanation-4: -As we know that condensation is the process of conversion of gaseous water into the liquid state and then it solidifies to form ice i.e. a solid state.

There is 1 question to complete.