Chapter 2: Is Matter around us Pure?

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Q
Is Matter around us pure?

Question:

Q.10: Classify the following into elements, compounds, and mixtures:

(a)     Sodium

(b)     Soil

(c)     Sugar solution

(d)     Silver

(e)     Calcium carbonate

(f)     Tin

(g)     Silicon

(h)     Coal

(i)      Air

(j)      Soap

(k)     Methane

(l)      Carbon dioxide

(m)   Blood

Answer:

Element is defined as a basic form of matter that cannot be broken down into simpler substances by chemical reactions.

The compound is the substance that is prepared by combining two or more elements in a fixed proportion.

The mixture is formed by combining two or more substances in which each substance retains its characteristics.

Element: (a) Sodium; (d) Silver; (f) Tin; (g) Silicon;

Compound: (e) Calcium carbonate; (k) Methane; (l) Carbon dioxide

Mixture: (b) Soil; (c) Sugar solution; (h) Coal; (i) Air; (j) Soap; (m) Blood


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