Question

Give with egs. the occurrence of Carbon in different free state & combined state​

Answer 1

Answer:

In nature, carbon occurs in free state as well as in combined state. In free state it is found as coal, diamond, graphite and fullerenes. In combined form, carbon occurs as: Mineral carbonates

Answer 2

Explanation:

i) Free state: A few metals occur native or free in the earth. Gold, platinum and silver are some of the metals occurring in the free state. They have low chemical reactivity and are not affected by the action of the chemicals or atmospheric conditions. These are the metals at the bottom of activity series.

(ii) Combined state: The metals having appreciable reactivity are found in the combined state. They occur as oxides, halides, sulphides, phosphates, silicates etc. The highly electropositive elements (Na, K, Mg, etc.) are found as compounds of highly electronegative elements (chlorine, oxygen etc.). Weakly electropositive (Fe, Cu) metals are found in combination with weakly electronegative elements (sulphur). Many metal ores are found as oxides. This is because oxygen is very reactive and very abundant on earth.

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