Question

Which of the following is a compound?
(A) Steel
(B) Brass
(C) Iron sulphide (D) lodine​

Answer 1

Answer:

The correct option is C .

Explanation:

a) steel is an alloy of iron and nicrome

b)brass is too an alloy

d) iodine an atom but not a molecule

hence the correct option is C iron sulphide(Fe2S).

hope it helps you....

Answer 2

Answer:

Iron sulphide  (FeS) is a compound.

Therefore, the option (C) is correct.

Explanation:

• A compound is formed by chemical bonding between two or more chemical elements. The formed chemical bonds can be a ionic bond or a covalent bond.

• Iron sulphide is formed by heating the iron and sulphur together. The formation of chemical bond between them. Therefore, iron sulphide is a compound.

                Fe  +  S $\longrightarrow$  FeS

• Alloy is not a compound. Alloy is mixture of two or more elements which are physically together, but there is no chemical bonding between them. Steel is an alloy made of iron and carbon  while Brass is an alloy made of zinc and copper.
• Iodine is a pure element. So it is an atom not a compound.

Therefore, among the given options only Iron sulphide is a compound.