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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Mention Two Uses of the Following Metals and Non-metals Iodine

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प्रश्न

Mention two uses of the following metals and non-metals 

Iodine    

एका वाक्यात उत्तर
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उत्तर

It is used in photographic films in the form of potassium iodide.
It is added to salt to make it iodized salt which is necessary for the growth of human body.

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पाठ 6: Metals and Non-metals - Exercise

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एस.पी. सिंह Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Exercise | Q 3.5

संबंधित प्रश्‍न

Give reasons for the following.

Sodium and potassium are stored in kerosene.


Which property of graphite is utilised in making electrodes?


The atomic number of an element X is 12.

  1. What must an atom of X do to attain the nearest inert gas electron configuration?
  2. Which inert gas is nearest to X?

Name an alloy of lead and tin.


Give reasons 

Magnesium is used in fire works. 


Give reasons 

Gold is mixed with copper and nickel.  


Statements given below are incorrect. Write the correct statements : 

Zinc is used for making power transmission wires.  


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

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


Name a metal which is best conductor of electricity :  


State two important uses of following metal: 

Uses of silver  


State the position of the following in the periodic table:

Iron and zinc


Give the general characteristics of:

Alkali metals,

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


What is it made from? Why?

A pair of tongs.


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

Zinc


Name the following:

A metal used in packaging.


Name the following:

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


Which one of the following four metals would be displaced from the solution of its salts by other three metals?


Metals are usually solids or gases at room temperature.


Metals have high melting points.


Why do metals appear shiny?


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