Question

match the following :
1.sodium -forms black oxide
2.copper -forms black metal sulphide
3.Silver -occurs in free state
4.Gold -reacts explosively cold with water
5.zinc-used in galvancing​

Answer 1

Answer:

sodium-reacts explosively cold with water

copper-forms black oxide

silver-forms black metal sulfide

gold-occurs in free state

zinc-used in galvancing

Explanation:

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