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Introduction :
A mixture is a combination of two or more substances that can retain its individual characteristics and properties. A mixture having a uniform composition throughout is known as a homogeneous mixture or a solution. A heterogeneous mixture is formed when the components of the two substances remain separate.
Answer to Problem 30A
Correct answer :
The correct answer is option (A) a heterogeneous mixture.
Explanation of Solution
Explanation/justification for the correct answer :
Option (A) a heterogeneous mixture. In a heterogeneous mixture, the components of the two substances are distinct and we can tell apart the components individually. The picture represents a mixture of nuts and bolts which are distinguishable from each other. Thus they form a heterogeneous mixture. So, the correct answer is option (A).
Explanation for incorrect answer :
Option (B) a homogeneous mixture. The components in a homogeneous mixture have uniform composition throughout. The picture represents a mixture of nuts and bolts which are distinguishable from each other. So, this is an incorrect option.
Option (C) a solution. A solution is formed by uniform composition throughout the mixture. The mixture of nuts and bolt is a heterogeneous mixture. So, this is an incorrect answer.
Option (D) a suspension. A heterogeneous mixture in which one component settles or remains suspended over the other is called a suspension. Sand and water is an example of a suspension where the sand particles do not dissolve in water but remain suspended in the water. Overtime, the sand particles settle down at the bottom. The mixture of nuts and bolt is a heterogeneous mixture but they do not form a suspension. Hence, this is an incorrect answer.
Chapter 6 Solutions
Biology Illinois Edition (Glencoe Science)
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