The World of Metals and Non-metals
Class 7 · Science · 10 Questions
Which metal is commonly used to make food packaging materials as it is cheaper, and its thin sheets can be folded easily into any shape?
Which of the following metal catches fire when it comes in contact with water?
State with reason(s) whether the following statements are True [T] or False [F].
Why are only a few metals suitable for making jewellery?
Match the uses of metals and non-metals given in Column I with the jumbled names of metals and non-metals given in Column II.
What happens when oxygen reacts with magnesium and sulfur. What are the main differences in the nature of products formed?
You are provided with three iron nails, each dipped in oil, water and vinegar. Which iron nail will not rust, and why?
How do the different properties of metals and non-metals determine their uses in everyday life?
One of the methods of protecting iron from getting rusted is to put a thin coating of zinc metal over it. Since sulfur does not react with water, can it be used for this purpose? Justify your answer.
An ironsmith heats iron before making tools. Why is heating necessary in this process?