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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
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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

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.


 For the reduction of metal oxide, suggest a reducing agent other than carbon.


What is an alloy? Give two examples of alloys.


Give two uses of Germanium  


Statements given below are incorrect. Write the correct statements : 

Zinc is used for making power transmission wires.  


State two important uses of following metal. 

Uses of copper  


Give the general characteristics of:

Alkaline earth metals with reference to

(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid


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

Hydrochloric acid,


Write name.
 Alloy of sodium with mercury.


Write name.

The oxide that forms salt and water by reacting with both acid and base.


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


Name the following:

The most reactive halogen.


Name the following:

The chemical compound responsible for the green deposit on the surface of articles of copper.


Name the following:

A metal used in flexible pipes.


Complete the following flow chart.


The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?


Give an example of a metal which

  1. is liquid at room temperature.
  2. is the best conductor of heat.

Why are bells made of metals?


Which metals are not solid at room temperature?


X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

______ is the reducing agent.


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