Is it true that when substances are mixed, it may result in a chemical or physical change depending on the conditions?

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True

False

answer is A.

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Detailed Solution

The above statement is true.
A physical or chemical change can occur when two or more substances are mixed. For example, when sugar is mixed in water, the sugar completely dissolves in water. This is a physical change as no new substances are formed, and sugar and water can be obtained back from the solution. Another example is when sulphur and iron are mixed, and the mixture is heated, then it glows, and a black-colored substance is obtained. Again, this is a chemical change as a new substance is formed, and iron and sulphur cannot be obtained back. Thus, mixing two substances results in either a chemical change or a physical change.

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