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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State why telegraph poles are painted with aluminium paint. - Chemistry

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प्रश्न

State why telegraph poles are painted with aluminium paint.

एका वाक्यात उत्तर

उत्तर

Aluminium paint is applied on telegraph poles because it act as an anti corrosive paint.

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पाठ 6: Metals and Non-metals - Exercise

संबंधित प्रश्‍न

Mark ‘T’ if the statement is true and ‘F’ if it is false.

Generally, non-metals react with acids. ( )


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

Write word equations of the reactions involved.


Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.

(a) How will she find the nature of the gas?

(b) Write down word equations of all the reactions taking place in this process.


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


Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.


What elements are present in steel? How are the properties of steel different from those of pure iron?


Fill in the blank 

_______ is a soft metal. 


A metal with melting point less than 50°C is


State two important uses of following metal 

Uses of copper  


State two important uses of following metal 

Uses of zinc  


State two important uses of following metal 

Uses of lead     


State the position of the following in the periodic table:

Alkaline earth metals


Write name.

Molecular formula of the common ore of aluminium.


Write name. 

 The reagent that dissolves noble metals.


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


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

Lead


Give a reason why a green deposit is seen on the surface of an article of copper


Match the columns.

Group A Group B
1) Copper and Zinc a) Brass
2) Copper and Tin b) Bronze
  c) Stainless steel

______ is the first scientist who used the term element.


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