Which statement best describes a physical change?

changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same.
changes can occur to certain physical properties of the substance, but the overall shape of the substance will remain the same.
changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.
changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.

Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.

Explanation:

Physical Change                                                                                              

The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.

These changes were reversible.

They have same chemical property.

These changes can be observed with naked eye.

Example :

Water converting to Ice

Water converting to gas

In this water molecule remain the same only they rearrange themselves that change its state of mater not composition

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

The reaction of Hydrogen and oxygen:

H 2 (g)  + O 2  (g) > 2H 2O  (l)

the answer is d

Explanation:

Changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.