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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Copper is Ductile and a Very Good Conductor of Heat and Electricity. this is the Reason that Copper is Used in Making Electric Cables. - Chemistry

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प्रश्न

Give reasons 

Copper is used in making electric cables. 

एक पंक्ति में उत्तर

उत्तर

Copper is ductile and a very good conductor of heat and electricity. This is the reason that copper is used in making electric cables.

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अध्याय 6: Metals and Non-metals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 6 Metals and Non-metals
Exercise | Q 4.3

संबंधित प्रश्न

Choose the correct answer from the options given below:

Anhydrous iron(III) chloride is prepared by:

1) direct combination

2) simple displacement

3) decomposition

4) neutralization


Name one property which is characteristic of  non-metals.


State one use of Sulphur.


You are given a dry cell, a torch bulb with holder, wires and crocodile clips. How would you use them to distinguish between samples of metals and non-metals?


Define non-metals. Give five examples of non-metals.


Name a non-metal that is liquid at room temperature   


Fill in the blank 

Tungsten metal is a poor conductor of _______


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

Non-metals are poor conductors of electricity.     


Name:

a metal with low melting and boiling points


`Cl +e- →  —`


`M+ HCl →  MCl_2 +—`  


Name:

a metal whose oxide is reduced only by carbon


Which metals do not corrode easily?


Explain the term  Gangue .


In which of the following industries, microbial enzymes are not used?
a) Glass industry.
b) Cheese industry
c) Tanning industry.
d) Paper industry.


Gold and silver are used to make jewellery. Give reason


With reference to the physical properties of metals and non-metals, state the following exception.

a non-metal which sublimes and is non-lustrous


Give a reason why – properties of metals are related to their activity or reactivity series of metals. Explain the same with reference to potassium and iron in the series.


Write the name.

Nonmetal which is a good conductors of electricity.


Name six common non-metals and write their symbols.


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