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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Why Are Alloys Made? - Chemistry

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प्रश्न

Why are alloys made?  

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उत्तर

Pure metals generally do not have all the properties of a good metal, such as malleability, ductility, tensile strength, hardness, resistance to corrosion etc. Hence, alloys are made to enhance these properties. An alloy will have a better quality than the individual metals (or a non-metal) that form it.

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पाठ 6: Metals and Non-metals - Additional questions 2

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Additional questions 2 | Q 8.2

संबंधित प्रश्‍न

Give an example of a metal which is the best conductor of heat.


Give an example of a metal which is a poor conductor of heat.


Give reasons for the following.

Immersion rods for heating liquids are made up of metallic substances.


Name a non-metal having a very high melting point.


What is the nature of the oxide SO2? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.


 State one use of Nitrogen.


(a) Give the names and formulae of one metal chloride and one non-metal chloride.
(b) State an important property in which these metal chloride and non-metal chloride differ.
(c) Why do they differ in this property?


Name a non-metal that is used for cancer therapy 


Name the metals present in the following alloys  

Brass  


State two important uses of following non-metal 

Uses of chlorine  


Name:

a metal whose oxide is reduced only by carbon


Explain the term  Gangue .


Complete the table.

 Property of metal  Use in everyday life
 i. Ductility  
 ii. Malleability  
 iii. Conduction of heat  
 iv. Conduction of electricity  
 v. Sonority  

Name a metal which does not corrode easily.


Which metal occurs as an oxide also gives the name of their respective ore.


Gold and silver are used to make jewellery. Give reason


Describe a simple experiment to prove that a copper wire conducts electricity, but a piece of coal does not.


The sound of one metal colliding with another makes a noise, this property is called as _______.


Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?


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