EVERYDAY SCIENCE

SCIENCE

PHYSICAL SCIENCES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
water freezing is an example of a(n) ____
A
physical change
B
chemical change
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -When liquid water (H2O) freezes into a solid state (ice), it appears changed; however, this change is only physical, as the composition of the constituent molecules is the same: 11.19% hydrogen and 88.81% oxygen by mass.

Detailed explanation-2: -Freezing and boiling are considered to be examples of chemical reactions.

Detailed explanation-3: -Freezing water is an example of a phase transition–a change in the physical properties of a substance when the temperature or pressure are changed.

Detailed explanation-4: -(d) Because it does not change chemical composition of cloth and the change is only in the state, size, shape, colour, texture or the smell of some or all of the substances that undergo physical change.

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