Materials Metal and Non Metal For Class 8 Science Extra Question Answer
Q1. Name the property due to which metals shine.
Q2. Give examples of metalloids.
Ans. Antimony, arsenic, silicon, boron, etc.
Q3. Name the property due to which metals can be beaten into thin sheets.
Q 4– Name the metal and non-metal which occur in liquid state.
Ans. Mercury (metal), bromine (non-metal).
Q 5– State the property of non-metals due to which phosphorus is kept in water.
Ans. Non-metals do not react with water.
Q 6– Which metal is used for wrapping food items?
Q 9 – Which metal is less reactive: Copper or zinc?
Q10. Which non-metal does conduct heat and electricity?
Q11. Generally, non-metals are non-lustrous. Name one non-metal which is lustrous.
Q12. Why do some metals displace other metals from their solution?
Ans: Because of being more reactive than the metals which they displace.
Q13. Which metal is used for wrapping food items?
Q14. Whose oxides are basic in nature: Metal or non-metal?
Q15. Whose oxides are acidic: Metal or non-metal?
Q16. Classify the following into metals and non-metals:
Copper, iron, graphite, sulphur, aluminium, oxygen
Ans: Metals: Copper, iron, aluminium
Non-metals: Graphite, sulphur, oxygen
Q17. What happens when metals react with oxygen?
Ans: Metal oxides are formed.
Q18. What happens when metals react with water?
Ans: Metals produce their hydroxides or oxides and hydrogen.
Q19. What is malleability?
Ans: Malleability is the property of a metal in which it can be beaten into thin sheets.
Q20. What is ductility?
Ans: Ductility is the property of metals due to which they can be drawn into wires.