Answer:

Explanation:
<u>Chemical formulas for every compound:</u>
Potassium vapor => 
Molten soldium chloride => 
Molten Potassium chloride => 
Molten Sodium Metal => 
<u>The reaction will be as follows:</u>

This reaction is usually called displacement reaction in which an element displaces another element of a compund.
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Friction is not useful in Machinery sometimes, Since it leads to the wear and tear of machine parts.
The <span>Anaphase stage
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Water can change it's STATE but it will not change it's COMPOUND.