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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

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

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प्रश्न

Mention two uses of the following metals and non-metals 

Aluminium  

एका वाक्यात उत्तर
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उत्तर

It is used to make electric wires.
It is used to make utensils, cans, window fram’es, etc.

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पाठ 6: Metals and Non-metals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Exercise | Q 3.2

संबंधित प्रश्‍न

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

Write word equations of the reactions involved.


Give a reason for Alkali metals are good reducing agents.


State five uses of metals


What is a thermite reaction? Explain with the help of an equation. State one use of this reaction.


Which of the following alloys contains mercury as one of the constituents?
(a) stainless steel
(b) solder
(c) duralumin
(d) zinc amalgam


Give reasons 

Magnesium is used in fire works. 


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. 


Name a metal which is best conductor of electricity :  


Write name.

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


Write scientific reason.

Generally the ionic compounds have high melting points.


State the position of the following in the periodic table:

Halogens


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

Zinc


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.


Write the name.

Two highly reactive metals-


A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.


Name two major non-metals which are present in fertilisers and enhance the growth of plants.


Why do metals appear shiny?


Why are metalloids called semimetals?


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