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Gold is soluble in:
  • hydrochloric acid
  • sodium hydroxide
  • nitric acid 
  • aqua regia.


D.

aqua regia.
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The most abundant metal in earth’s crust is:
  • copper
  • aluminium
  • oxygen
  •  iron.

What are metals?

Give important physical characteristics of metals.

What do you understand by malleability and ductility of a metal? Give examples of two metals which are both ductile and malleable.

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