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

Answer:

a-gold and platinum

b-sodium and potassium

c-iron oxide Fe2O3

Answer 2

Explanation:

• (a) Free state means non bonded state, i.e. H. Element is already an electronic octet, so its stability is not required.
• Many metals are naturally free, such as gold and silver.
• (b) Magnesium and sodium are two metals that are always in a bound state.
• (c) Iron (III) oxide is an iron compound present in hematite.
• The chemical formula is $Fe_2 O_3$. Hemite is one of the richest minerals in the earth's surface and flat crust. It is a very common rock-forming mineral found in sedimentary, metamorphic and hardening rocks around the world.