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Science
10th
grade
Metals and Non-Metals | Chapter Assessment | English | Grade 10
6 questions
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- 1. Multiple Choice
Name two metals which are highly resistant to corrosion.
Gold, platinum
Copper and silver
Iron and steel
Tin and mercury
- 2. Multiple Choice
Which property of ‘solder’ alloy makes it suitable for welding electrical wires?
High melting point
High ignition temperature
Low melting point
None
- 3. Multiple Choice
Why, carbon cannot reduce oxides of sodium or magnesium?
because these metals have less affinity for oxygen than carbon
because these metals have more affinity for oxygen than carbon
Both 1 and 2
None
- 4. Multiple Choice
Metals like Na, K, Ca and Mg never found in their free state in nature because _________________________ .
they are very reactive
they are very less reactive
Both 1 and 2
None
- 5. Multiple Choice
The corrosion of iron is called ___________.
rusting
galvanisation
roasting
Both 1 and 2
- 6. Multiple Choice
The rocky material found with ores is called ______________ .
ore
ore source
electrolyte
gangue
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