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सी.आई.एस.सी.ई.आईसीएसई 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.

एक पंक्ति में उत्तर

उत्तर

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

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अध्याय 6: Metals and Non-metals - Exercise

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संबंधित प्रश्न

The atomic number of an element X is 12.
(a) What must an atom of X do to attain the nearest inert gas electron configuration?
(b) Which inert gas is nearest to X?


What is an amalgam?


Mention two uses of the following metals and non-metals 

Oxygen


Give two uses of Germanium  


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

Brass is an alloy of copper and zinc and has lustrous yellow colour. 


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:

Oxygen


Why are alkali metals kept in kerosene oil?


Write scientific reason.

Pine oil is used in froth flotation.


The electronic configuration of metal ‘A’ is 2,8,1 and that of metal ‘B’ is 2,8,2. Which of the two metals is more reactive? Write their reaction with dilute hydrochloric acid.


What is it made from? Why?

Ornaments


Name the following:

A metal used in packaging.


Higher Order Thinking Skills.

Aakash noticed that the metal latch on gate was difficult to open during hot sunny days. However, it was not difficult to open the same latch at night. Aakash observed that the latch and the gate are exposed to the sun during day time.

  1. Formulate a hypothesis based on the information provided.
  2. Briefly state how you would test the hypothesis.

Why are bells made of metals?


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?


______ is the first scientist who used the term element.


Metals are usually solids or gases at room temperature.


Metals and non–metals are used for making ______, ______ and ______.


Metals have high melting points.


Which metal has the highest ductility?


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