Pure,24k gold is very malleable.by mixing gold with other metals it becomes less malleable.in what situations would you want to use gold that is not as malleable?

You could use the less malleable mixture of minerals.  Say you have a gold earring this is bad because overtime it goes through lots of wear and tear, the shape of the earring will change. If it was less malleable it will withstand more wear and tear.

Chlorine should be the answer but wait for another response as it’s been a while since I did science