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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State the Composition and Two Uses of Given Alloy : Brass - Chemistry

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प्रश्न

State the composition and two uses of given alloy:  

Brass   

टीपा लिहा

उत्तर

 Brass :It is an alloy of 40% to 20% zinc and 60% to 80% copper.
Uses of brass :

  • It is used for making tap and electric switches,
  • It is used for making household utensils.
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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 9.3

संबंधित प्रश्‍न

Choose the correct answer from the options given below:

Anhydrous iron(III) chloride is prepared by:

1) direct combination

2) simple displacement

3) decomposition

4) neutralization


State why concentrated sulphuric acid is not used for drying ammonia gas


Name the non-metal which is used to make electrodes of dry cells.


Name two non-metals which are both brittle and non-ductile.


Name a non-metal which conducts electricity.


Name a non-metal that is used for filling into electric bulbs 


Name the metals present in the following alloys 

Bronze 


Fill in the blank 

A chemical compound that makes up the striking heads of match sticks is ......................... 


Tick (√) the most appropriate answer.
Copper metal is used in :


Name a non-metal whose compounds help in the growth of plants.  


`Mg -—  → Mg^(2+)`


Complete the table.

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

Write scientific reason.

Copper and brass vessels are cleaned with lemon.


Classify the given elements into metals, non - metals, and metalloids. :
Carbon, Boron, Sodium, Oxygen.

Give reason for the following:

Rusting reduces the structural strength of iron.


_______ is good conductor of heat but bad conductor of electricity.


Brass : Aluminium and zinc : : Bronze : ______


Find the odd one out and give its explanation.


______ is the only non-metal which conducts electricity.


The metal is stored in kerosene ______.


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