Question

"(a) Name two metals which are found in nature mainly in the free state (as metallic elements).
(b) Name two metals which are always found in combined state.
(c) What iron compound is present in haematite ore? Also write its chemical formula."

Answer 1

a. gold and plat6

b.

.it occurs in rocks as metalssulphates and sulphides. 2.it is alsopresent as Hydrogen sulphide which ispresent in petroleum and natural gas. In nature most metals occur in combined state as minerals

c.

fe 2o3 is the formula of hematite .

Answer 2

(a) Gold and platinum are found naturally as metallic elements in the free state.

(b) Magnesium and potasium are found in combined state always.

(c) In haematite ore, $Fe2O_3$ [Iron (III) oxide] is present.    

Explanation:

• A native metal is referred to any metal which if found either as an alloy or pure metallic form in nature. Some examples are platinum, silver and mercury.
• These are not found to form any type of alloys and they are less reactive.