The copper-plated 'Statue of Liberty' is greenish blue in colour rather than orange–red, this is because of __________ reaction.

solubility

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oxidization

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sonority

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malleability

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Solution

The correct option is B oxidization
The 'Statue of Liberty' is coated with a thin layer of copper, which turns to greenish-blue with the time due to the chemical reaction between the metal and water. Copper reacts with the atmospheric oxygen and get oxidized. The copper atoms donate electrons to oxygen. Here copper is oxidized while oxygen is reduced. (Oxidation is loss of electrons or an increase in oxidation state by molecule, atom or ion. Reduction is gain of electrons or a decrease in oxidation state by a molecule, atom or ion.) The equation for oxidation of copper is: $2 C u + H_{2} O + C O_{2} + O_{2} \to C u (O H)_{2} + C u C O_{3}$

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Similar questions

Assertion:- Statue of liberty in USA turned green because it is made up of copper.

Reason:- Copper gets tarnished and forms a green layer when exposed to the atmosphere.

Which colour change is observed when dilute $HCl$ is added to a beaker containing copper oxide?

6

The elements of sets A , B and C are all colours as follows:

A = { Red , Orange , Yellow , Brown } ,

B = { Blue , Yellow , Green , Brown } ,

C = { Black , Brown , White , Grey }

Then, A U B U C is

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