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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State a Specific Reason for Using Copper in Electrical Cables

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प्रश्न

State a specific reason for using copper in electrical cables

एका वाक्यात उत्तर
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उत्तर

Copper is used in electrical cables because it is a good conductor of electricity.

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पाठ 6: Metals and Non-metals - Exercise

संबंधित प्रश्‍न

What happens when Dilute sulphuric acid is poured on a copper plate?

Write word equations of the reactions involved.


Give the composition of an alloy called solder. State its one property and one use.


Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.


What elements are present in steel?


A metal which is neither ductile nor malleable is


Write ‘True’ or ‘False’ in front of following statement.  

Brass is an alloy of copper and zinc and has lustrous yellow colour. 


State two important uses of following metal 

Uses of lead     


Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Write name of any element present in the same group as X


What was Mendeleev's basis for the classification of elements?


What is it made from? Why?

A pair of tongs.


What is it made from? Why?

Electric cables


With reference to the following metal state its use in daily life:

Magnesium


State why telegraph poles are painted with aluminium paint.


Complete the following flow chart.


What is ductility?


Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?


Which of the following two combinations are correct?

 

  Metal Gas Evolved
(i) Copper Yes
(ii) Iron Yes
(iii) Magnesium No
(iv) Zinc Yes

Which one of the following metals do not react with cold as well as hot water?


Compare the conductivity of metals and non–metals.


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