Science - Class 8 (C ...

Q23. What is malleability?

 

Q24. What is ductility?

 

Q25. Name the product formed in the reaction of sulphur and oxygen.

 

Q26. What is the nature of the oxide formed by sulphur?

 

Q27. What are metalloids?

 

Q28. What type of oxides is formed by metals?

Or

What is the nature of oxides of metals?

Or

What type of oxides is formed when metals combine with oxygen?

 

Q29. Name the metal which is found in liquid state at room temperature.

 

Q30. Is rust acidic, basic or neutral in nature?

 

Q31. What type of oxides is formed by non-metals?

Or

What is the nature of oxides of non-metals?

Or

What type of oxides is formed when non-metals combine with oxygen?

 

Q32. Explain why aluminium foils are used to wrap food items.

 

Q33. What are the uses of metal?

 

Q34. How metals and non-metals react with water?

 

Q35. What do you mean by displacement reaction?

 

Q36. What are the physical properties of metals?

 

Q37. Why are sodium and potassium stored in kerosene?

Or

Sodium and potassium are stored in kerosene. Give reason.

 

Q38. What kind of handle does screw driver have and why?

 

Q39. Why are bells made of metal and not of wood or other material?

Or

Why are metal used for making bells?

 

Q40. Is there a difference in the way metals and non-metals react with acids?

 

Q41. Why immersion rods for heating liquids are made up of metallic substances?

 

Q42. When materials like coal and pencil lead are beaten, their shapes do not changes, rather break down into small pieces. Why so?