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Subjects
Science CBSE
Class 7 New
The World of Metals and Non-metals
Pumpa Practice Questions
7.
Properties of metals
Exercise condition:
3
m.
Answer the following questions:
What are the different physical properties of metals?
i.
How does most of the metals appear to be in their pure form?
Most of the metals have shiny appearance in their pure form known as metallic lustre
Most of the metals do not have shiny appearance
Only a few metals have shiny appearance in pure form
Most of the metals appear to be dull in their pure form
Example:
Sodium and sulphur
Gold and silver
Iron and diamond
Carbon and platinum
ii.
Why sodium and potassium cannot be used for making heavy tools?
They are vey strong and least reactive metals
They are very soft and least reactive metals
They are very soft and highly reactive metals
They are very hard and least reactive metals
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