Question

Which of these is an example of recombination of atoms to form newer molecules?

Molding a wire of gold
Hammering a piece of iron
Tarnishing of a silver coin
Rolling of a sheet of aluminum

Answer 1

Answer: Option (c) is the correct answer.

Step-by-step explanation:

When there is recombination of atoms to form newer molecules then it is called a chemical change.

For example,
`A-B + C-D \rightarrow A-C + B-D` is a chemical change.

Tarnishing of a silver coin is a chemical change which occurs when silver reacts with moisture in the air as a result silver loses its luster.

Thus, we can conclude that out of the given options tarnishing of a silver coin is an example of recombination of atoms to form newer molecules.

Answer 2

The correct option is C.
The recombination of atoms to form newer molecules is called chemical change. Tarnishing is a chemical change that occur when a metal lose luster as a result of exposure to moisture and water which results in a thing layer of corrosion which forms over the metal.