Question

3)
Which statement describes a mixture of sand and
water at room temperature?
(1) It is heterogeneous, and its components are
in the same phase.
(2) It is heterogeneous, and its components are
in different phases.
(3) It is homogeneous, and its components are in
the same phase.
(4) It is homogeneous, and its components are in
different phases.​

Answer 1

Answer:

(2) It is heterogeneous, and its components are in different phases.

Explanation:

The sand is a solid, and the water is a liquid. These are two different phases, and you can see the boundaries between them. The mixture is heterogeneous.

(1) is wrong. By definition, a heterogeneous mixture consists of more than one phase.

(4) is wrong. By definition, a homogeneous mixture consists of one phase.

Answer 2

The statement describes a mixture of sand and water at room temperature - (2) It is heterogeneous, and its components are in different phases.

A mixture is a physical mix or combination of two or more types of substances together. In the mixture, each component exhibits its original properties and can be separated.

On the basis of the state or phase of components mixture are two types:  

• homogeneous mixture - if components have the same physical state or phase that is liquid-liquid or solid-solid or gas-gas.
• heterogeneous mixture - if components have different physical states such as solid-liquid, gas-solid, liquid-gas.

If sand and water mix together at room temperature there would be a heterogeneous mixture due to two different phases present in this mixture sand is in the solid phase whereas water is in the liquid phase.

Thus, the statement describes a mixture of sand and water at room temperature - (2) It is heterogeneous, and its components are in different phases.

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