हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

With Reference to the Following Metals State Their Use in Daily Life Metal: Copper

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प्रश्न

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

copper

एक पंक्ति में उत्तर
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उत्तर

Copper:

  1. Making calori meters as it is good conductor of heat.
  2. Making thin wires being conductor of electricity.
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अध्याय 6: Metals and Non-metals - Exercise

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संबंधित प्रश्न

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.


How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?


What is meant by 22 carat gold?


Give reasons  

Aluminium is used in making aircrafts.  


Give reasons 

Gold is mixed with copper and nickel.  


Fill in the blank spaces by choosing the correct words from the given list. 

List: amalgam, chlorine, gallium, sodium chloride, silver chloride 

______ is a liquid metal. 

 


Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride 

A solution of a metal in mercury is called ________


State two important uses of following metal: 

Uses of zinc  


State two important uses of the following metal. 

Uses of magnesium  


State the position of the following in the periodic table:

Alkali metals


State the position of the following in the periodic table:

Alkaline earth metals


Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:

Sulphuric acid


Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:

Water.


 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

 


Give reasons for the following:
Most metals conduct electricity well.


What is it made from? Why?

Ornaments


Name the following:

A halogen which is a solid at room temperature.


Can you store pickle in an aluminium utensil? Give reason.


Which of the following metals are obtained by electrolysis of their chlorides in molten state?

  1. Na
  2. Ca
  3. Fe
  4. Cu

The metals which are found in both free state as well as combined state are ______.


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