EASY
Earn 100

is the name of the green coloured coating formed on the surface of copper, when it reacts with carbon dioxide.

100% studentsanswered this correctly

Important Questions on Metals and Non-metals

EASY
Science>Chemistry>Metals and Non-metals>Corrosion
Define corrosion and write two ways to prevent the corrosion.
MEDIUM
Science>Chemistry>Metals and Non-metals>Corrosion
What is corrosion? Give remedies for the prevention of corrosion.
MEDIUM
Science>Chemistry>Metals and Non-metals>Corrosion
Mention two ways of preventing rusting of iron.
MEDIUM
Science>Chemistry>Metals and Non-metals>Corrosion
Corrosion of copper gives rise to a green coating known as _____.
EASY
Science>Chemistry>Metals and Non-metals>Corrosion
What is corrosion? Write any three methods to prevent corrosion.
 
EASY
Science>Chemistry>Metals and Non-metals>Corrosion
Which metal doesn't corrode easily?
MEDIUM
Science>Chemistry>Metals and Non-metals>Corrosion
Copper loses its brown layer gradually when exposed to air. Give reason.
EASY
Science>Chemistry>Metals and Non-metals>Corrosion
Silver articles become black when kept in open for some time, whereas copper vessels lose their shiny brown surfaces and gain a green coat when kept in open. Name the substances present in air with which these metals react and write the name of the products formed.
EASY
Science>Chemistry>Metals and Non-metals>Corrosion

Give reasons:

Aluminium is a highly reactive metal. Yet it is used to make utensils for cooking. 

EASY
Science>Chemistry>Metals and Non-metals>Corrosion

Explain, why copper reacts with moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat. 

EASY
Science>Chemistry>Metals and Non-metals>Corrosion
Why do we apply paint on iron articles?
MEDIUM
Science>Chemistry>Metals and Non-metals>Corrosion
State two ways to prevent the rusting of iron.
MEDIUM
Science>Chemistry>Metals and Non-metals>Corrosion
If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of 
EASY
Science>Chemistry>Metals and Non-metals>Corrosion
Which is not a step of metallurgy?
HARD
Science>Chemistry>Metals and Non-metals>Corrosion
Why do we apply paint on iron articles?
EASY
Science>Chemistry>Metals and Non-metals>Corrosion

Solder is an alloy of lead and tin.

State one important use of water.

 

MEDIUM
Science>Chemistry>Metals and Non-metals>Corrosion
Name the process by which impure ore of aluminium gets purified by using concentrated solution of an alkali.
MEDIUM
Science>Chemistry>Metals and Non-metals>Corrosion
State the differences between rusting and rust.
 
HARD
Science>Chemistry>Metals and Non-metals>Corrosion
What is rust? Write chemical equation of rusting. 
EASY
Science>Chemistry>Metals and Non-metals>Corrosion
What is corrosion?