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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Give Reasons Aluminium is Used in Making Aircrafts.

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प्रश्न

Give reasons  

Aluminium is used in making aircrafts.  

एका वाक्यात उत्तर
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उत्तर

Aluminium is used in making aircrafts because it is light and strong. It is mixed with other metals to make it stronger.

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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 4.2

संबंधित प्रश्‍न

A metal which is neither ductile nor malleable is


Statements given below are incorrect. Write the correct statements : 

Bronze is a mixture of 10% copper, 80% zinc and 10% tin.  


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

Magnesium is used in making light weight alloys of aluminium. 


State two important uses of following metal: 

Uses of gold  


State two important uses of following metal:

Uses of aluminium


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

Hydrochloric acid,


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

Oxygen


Name the following:

A metal used in flexible pipes.


Name the following:

A halogen which is a solid at room temperature.


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.


Complete the following flow chart.


Which one of the following is an example for a metal?


Why are bells made of metals?


The ability of metals to be drawn into thin wire is known as


The metal can be cut with a knife ______.


Silver and copper are very good conductors of electricity.


Match the following

i. Silica a. Caustic potash
ii. Potassium hydroxide b. Sand
iii. Sodium hydroxide c. Calamine
iv. Zinc carbonate d. Caustic soda

Which metals are not solid at room temperature?


Compare the conductivity of metals and non–metals.


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