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प्रश्न
Answer the following question:
Why are copper and aluminium used to make electric wires?
उत्तर
Copper and aluminium are good conductors of heat and electricity. They can be drawn into wires and beaten into sheets. Therefore, they are used to make electric wires.
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संबंधित प्रश्न
What are the different types of mixtures ?
Indicate whether the following statement is true or false:
All elements are artificially prepared
Tick (√) the correct alternative from the choice given for the following statement.
The most abundant elements in the universe are
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Complete the statement given below by filling in the blank with the correct word.
An element is a pure substance which cannot be broken down by physical or _________ methods.
Write the names of elements from the following symbol:
Cd
Select the correct answer from the choice in the bracket.
The positively charged particle of an atom.
Select the correct answer from A, B, C, D & E for the statement given below :
A metalloid.
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
