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Question

State whether true or false. Justify your answer.

1. Water is a mixture.

2. Milk is a compound.

3. Brass is an element.

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Solution

1. False.

The correct statement is:

Water is a compound.

Justification: Water is not a mixture because it is formed when the hydrogen and oxygen atoms combine with each other on the molecular level. Although the hydrogen and oxygen atoms can be separated from each other by electrolysis, they were at one time combined by a chemical bond. Therefore, water is considered as a compound i.e., a molecule made up of two or more elements.

2. False.

The correct statement is:

Milk is a mixture.

Justification: An element is a substance that cannot be broken down into anything simple while a compound is formed when two or more elements combine together chemically, and a mixture is formed when two or more different substances are mixed together. So, milk is formed by combining different substances together.

3. False.

The correct statement is:

Brass is not an element or Brass is an alloy.

Justification: Brass is an alloy as it is made up of copper and zinc metals.


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