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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Mention Two Uses of the Following Metals and Non-metals Gold - Chemistry

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प्रश्न

Mention two uses of the following metals and non-metals  

Gold 

एक पंक्ति में उत्तर
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उत्तर

It is used for making ornaments and coins.
It is used in the manufacture of electronic devices like computers, telephones, home appliances, etc.

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अध्याय 6: Metals and Non-metals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 6 Metals and Non-metals
Exercise | Q 3.3

संबंधित प्रश्न

The atomic number of an element Y is 16.
(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?
(b) Which inert gas is nearest to Y?


Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.


What is an alloy? How is an alloy made?


Give reasons 

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Give reasons  

Aluminium is used in making aircrafts.  


Fill in the blank 

A metal that gives dazzling effect to crackers when they explode is ______


Statements given below are incorrect. Write the correct statements : 

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


State two important uses of following metal: 

Uses of gold  


Write name.

Molecular formula of the common ore of aluminium.


Write scientific reason.

Anodes need to be replaced from time to time during the electrolysis of alumina.


Give a reason why iron objects rust easily but the iron pillar at Qutab Minar has not rusted over the years.


State a specific reason for using copper in electrical cables


Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)


An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.


A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.


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


Compare the conductivity of metals and non–metals.


The metals which are found in both free state as well as combined state are ______.


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