15th of March 2017

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.

Soni Kumari - CBSE - Class X

Wednesday, March 15, 2017 at 17:01:PM


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.

Wednesday, March 15, 2017 at 17:58:PM