Question

21. Identify the following combinations as heterogeneous mixtures or homogenous

mixtures.

a. soda water (Carbon dioxide is dissolved in water.)

b. a mixture of iron metal filings and sulphur powder (Both iron and sulphur are

elements.)

c. sodium amalgam, a combination of sodium metal dissolved in a small amount

of mercury​

Answer 1

Answer:

a) homogeneous

b) heterogeneous

c) heterogeneous

mixture of one element is called as homogeneous

mixture 2 or more elements called as heterogeneous

Answer 2

$\purple{\bigstar}\large{\underline{\textsf{\red{Required Answer}}}}$

a. Soda water (Carbon dioxide is dissolved in water).

⟶ Heterogeneous mixture

b. A mixture of Iron metal filings and sulphur powder (Both iron and sulphur are elements).

⟶ Heterogeneous mixture

c. sodium amalgam, a combination of sodium metal dissolved in a small amount of mercury.

⟶ Homogeneous mixture

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Extra information :

Homogeneous mixture

• It is a mixture in which the composition is uniform throughout the mixture.
• Homogeneous mixture consists of a single phase.

• For example :-

1. Salt mixture [ Mixture of salt in water. ]
2. Sugar water [ Mixture of sugar in water. ]
3. Alcohol

Heterogeneous mixture

• It is a mixture in which the composition is not uniform throughout the mixture.
• Heterogeneous mixture consists two or more phases.

• For example :-

1. Air
2. Sand
3. Mixture of Oil and water.