Answered

Which of the following is a physical change for the element lead?
O generating heat when lead is placed into a solution of sodium hydroxide, making
lead(II) hydroxide
O melting lead
O burning lead
generating a gas when lead is placed into nitric acid, making lead(II) nitrate
combining lead with oxygen to make lead(II) oxide

Verified Answer :

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Final answer:

Melting lead is a physical change, burning lead is a chemical change, and generating heat when lead reacts with sodium hydroxide is a physical change.


Explanation:

Physical: Melting lead is a physical change because it involves a change in state from solid to liquid without altering the chemical composition. It is reversible upon cooling.

Chemistry: Burning lead is a chemical change as it involves a reaction with oxygen to form new substances such as lead oxide. This change is irreversible.

Physical: Generating heat when lead reacts with sodium hydroxide to form lead(II) hydroxide is a physical change as it involves a temperature change without altering the lead's chemical identity.


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