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explain the following:
a] metals like na,ca and mg are never found in a free state.
b]solder is used for welding electrical circuits.
c]silver ornaments turn blackish after some time.
d]gold is used for making jewellry.
e]gallium will melt if u jkeep it on your palm.

Asked by aravind kumar 15th March 2017, 5:01 PM
Answered by Expert

Dear Soni,

Please post one query at a time.

Answer to your first query is given below:

Since they are highly reactive metals and hence they are not found in their free state in nature.

Answered by Expert 15th March 2017, 5:58 PM
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