Q. 123.9( 17 Votes )

A student has found black coating on his silver coins and green coating on his copper coins. Which chemical phenomenon is responsible for this? Write chemical name of these coatings.

Answer :

The chemical phenomenon which is responsible is corrosion.

When a metal is attacked by substances around it such as moisture, acids, etc. it is said to corrode and this process is called corrosion.


After corrosion, the colour of:


Silver changes to black


Copper changes to green


Hence, the chemical name of coatings are silver coating and copper coating.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Doubt Session - Types of Chemical ReactionsDoubt Session - Types of Chemical ReactionsDoubt Session - Types of Chemical Reactions44 mins
How to Identify Type of Reactions?How to Identify Type of Reactions?How to Identify Type of Reactions?35 mins
Goprep Genius  Quiz | Redox Reactions and its ApplicationsGoprep Genius  Quiz | Redox Reactions and its ApplicationsGoprep Genius Quiz | Redox Reactions and its Applications35 mins
Interactive Quiz - Types of Chemical ReactionsInteractive Quiz - Types of Chemical ReactionsInteractive Quiz - Types of Chemical Reactions57 mins
Redox ReactionRedox ReactionRedox Reaction27 mins
Champ Quiz | Types of Double Displacement ReactionChamp Quiz | Types of Double Displacement ReactionChamp Quiz | Types of Double Displacement Reaction45 mins
Master Redox Reactions Within 30 MinutesMaster Redox Reactions Within 30 MinutesMaster Redox Reactions Within 30 Minutes30 mins
Genius Quiz | All About Oxidising and Reducing AgentsGenius Quiz | All About Oxidising and Reducing AgentsGenius Quiz | All About Oxidising and Reducing Agents38 mins
Quiz | Master Redox Reactions Within 45 MinutesQuiz | Master Redox Reactions Within 45 MinutesQuiz | Master Redox Reactions Within 45 Minutes41 mins
Balance the Chemical EquationsBalance the Chemical EquationsBalance the Chemical Equations49 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses