Question

pls answer only 2 one ok p please answer correctly​

Answer 1

Explanation:

Hydrogen gas.

Gold metal.

Sugar (sucrose)

Baking soda (sodium bicarbonate)

Ammonia.

Diamond.

Copper wire.

Silicon chip.

The examples of pure and impure substances are as follows: Examples of the pure substances are as follows: Sulphur. Tin.

...

Example of the impure substances are as follows:

Salt mixed in water.

Fruit salad.

Muddy water.

Chocolate chips dipped in cookies.

Milk and cereals.

Vegetable soup.

Sand mixed in water.

Rocks. hope it helps

Answer 2

Answer:

Pure substances - 

1. Pure substances have definite composition and definite physical and chemical properties. 

2. They are all homogeneous i.e. their composition is uniform throughout the bulk. 

3. Examples: Elements and compounds. 

Impure substances - 

1. Impure substances are made up of two or more pure substances mixed together in any proportion. 

2. They may be homogeneous or heterogeneous i.e. their composition is not uniform throughout the bulk. 

3. They are all mixtures. 

Examples: air, sea water, petroleum. a solution of sugar in water are all impure substances. 

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