HARD
6th CBSE
IMPORTANT
Earn 100

There are some materials such as iron nails, silver and gold ornaments, which lose their lustre when exposed to air. Why does this happen?
(a)All the materials are made of metals
(b)These are not made of pure substances
(c)They react with oxygen / sulphur / moisture and a layer is formed over them
(d)Both (A) and (C)

44.74% studentsanswered this correctly

Important Questions on Sorting Materials into Groups
MEDIUM
6th CBSE
IMPORTANT


MEDIUM
6th CBSE
IMPORTANT

Name the materials used to make it

MEDIUM
6th CBSE
IMPORTANT

What is the reason of choosing these materials to make it?
