मराठी

Bronze is an alloy of ______.

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प्रश्न

Bronze is an alloy of ______.

पर्याय

  • copper and tin

  • copper and zinc

  • tin and zinc

  • copper, zinc and tin  

MCQ
रिकाम्या जागा भरा
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उत्तर

Bronze is an alloy of copper and tin.

Explanation:

Bronze is a solid alloy composed primarily of 88% copper and 12% tin. It is used in the production of hardware, utensils musical instruments, medals, and other items. Due to its resistance to corrosion caused by seawater, it is used in submerged bearings and ship propellants.

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पाठ 6: Metals and Non-metals - Additional questions 1

संबंधित प्रश्‍न

Tinning : Tin : : Galvanizing : _________


Which of the following methods is suitable for preventing an iron frying pan from rusting?


Two methods by which rusting of iron can be prevented are ______ and ______.


Explain why rusting of iron objects is faster in coastal areas than in deserts.


Name any three objects (or structures) which are gradually damaged by the corrosion of iron and steel.


Name the metal which is used for galvanising iron.


In one method of rust prevention, the iron is not coated with anything. Which is this method?


______ and ______ are necessary for the rusting of iron.


Why is an iron grill painted frequently?


What is corrosion?


Name two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface.


Name five methods of preventing rusting of iron.


What are the constituents of stainless steel?


Explain why, when a copper object remains in damp air for a considerable time, a green coating is formed on its surface. What is this process known as?


If copper is kept exposed to damp air for a considerable time, it gets a green coating on its surface. This is due to the formation of ______.


Mention two uses of the following metals and non-metals  

Iron 


Explain how the activity series accounts for each of the following:

tendency to corrosion


What is corrosion? What are necessary conditions for corrosion?


Explain with reason:

Roasting is carried out on sulphide ores and not on carbonate ores.


Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process.
The iron rust is formed due to........................... reaction. Different
regions on iron surface become anode and cathode.
 Reaction on anode region :

`F_e(s) → Fe^(2+) (aq) +2e^-`

 Reaction on anode region :

`O_2(g) + 4H^+(aq) +............................ → 2H_2 O (l) `

When Fe2+ ions migrate from anode region they react with ................... to form Fe3+ ions.
A reddish coloured hydrated oxide is formed from ............... ions. It is called rust.

`2Fe_(3+) (aq) + 4H_2O(l) → ................. + 6H_+(aq) `

A way to prevent rusting ..................................................................

 

 


Identify the process shown in the diagram and explain it in short


What are the adverse effects of corrosion?


Write three methods of preventing rusting of iron.


What is ‘rusting’?


State whether the statement given below is true or false. If false write the correct statement.

Graphite is a lustrous non-metal which conducts electricity.


Write a short note on Alloying.


To prevent corrosion of iron and steel _______ method is used.


 _______ forms a green colour in the water.


Stainless steel is an alloy of _______.


Find the odd one out and give its explanation.


Write the name.

Method used to prevent corrosion of copper.


Write a molecular formula for rust.


Give preventive methods by giving examples of corrosion?


The process of coating the surface of the metal with a thin layer of zinc is called ______


State two conditions necessary for rusting of iron.


Copper objects lose their shine and form green coating of ____________.


Identify the correct statement from the following:


Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?


Generally, when metals are treated with mineral acids, hydrogen gas is liberated but when metals (except Mn and Mg), treated with HNO3, hydrogen is not liberated, why?


Galvanisation is a process used to prevent the rusting of which of the following?


In ______ process a layer of molten tin is deposited on metals.


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