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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State a Specific Reason for Using Copper in Electrical Cables - Chemistry

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प्रश्न

State a specific reason for using copper in electrical cables

एका वाक्यात उत्तर

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

Fill in the blanks:

Metals react with acids to produce _________ gas.


Which property of graphite is utilised in making electrodes?


State one use of Silver.


State one use of Gold.


Which property of 'solder' alloy makes it suitable for welding electrical wires?


Fill in the following blank with suitable word:

Brass is an alloy of copper and .........


Give reasons 

Gold is mixed with copper and nickel.  


Write ‘true’ or ‘false’ for the following statement : 

Silver is used to make electric cables.


Aluminium is not used to make : 


 Match the alloys given in column I to the uses given in column II : 

Column I Column II
(i) Duralumin  A. Electrical fuse
(ii) Solder B. Surgical instruments 
(iii) Brass  C. Aircraft body 
(iv) Stainless Steel   D. Decorative articles

 


State the position of the following in the periodic table:

Halogens


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

iron


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

Magnesium


Name the following:

A metal used in flexible pipes.


Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.


Assertion: Mercury is solid in room temperature.

Reason: Mercury is a non-metal.


The ability of metals to be drawn into thin wire is known as


In the given figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.

  1. ______  is a metal.
  2. Metals are good ______ of electricity. 

Silver and copper are very good conductors of electricity.


Compare the conductivity of metals and non–metals.


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