Q13. (i) Which metals do not corrode easily?(ii) Why do silver ornamen

1.	Q13. (i) Which metals do not corrode easily?(ii) Why do silver ornaments turned black?(iii) What is the reaction between black compound of silver with dil H2SO?
Answer» Metal such as gold (Au) and platinum (Pt) present at the bottom of the activity series do not corrode easily. The major reason behind silver turning black or tarnishes out is due to presence of various chemical reactions that occurs in contact with sulfur and Hydrogen. Our food items, everyday need products, polluted air consist of sulfur that leads to tarnish silver and make it to look black in color. Silver will not react with sulphuric acid because it is least reactive metal to produce hydrogen by reacting with sulphuric acid.

Q13. (i) Which metals do not corrode easily?(ii) Why do silver ornaments turned black?(iii) What is the reaction between black compound of silver with dil H2SO?

Answer»

Metal such as gold (Au) and platinum (Pt) present at the bottom of the activity series do not corrode easily.

The major reason behind silver turning black or tarnishes out is due to presence of various chemical reactions that occurs in contact with sulfur and Hydrogen. Our food items, everyday need products, polluted air consist of sulfur that leads to tarnish silver and make it to look black in color.

Silver will not react with sulphuric acid because it is least reactive metal to produce hydrogen by reacting with sulphuric acid.

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