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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State the composition of given alloy: Bronze - Chemistry

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प्रश्न

State the composition of given alloy: 

Bronze 

एका वाक्यात उत्तर

उत्तर

It is an alloy of 80% copper, 10% zinc and 10% tin.

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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 9.4

संबंधित प्रश्‍न

Write a balanced chemical equation for the action of heat on aluminium hydroxide.


Name two metals which are used for making electric wires.


 Choose the acidic oxides, basic oxides and neutral oxides from the following:
Na2O; CO2; CO; SO2; MgO; N2O; H2O.


Name the metal which is used in making thermometers.


Name a non-metal which conducts electricity.


State any three differences between the physical properties of metals and non-metals.


 Name a metal that is brittle  


`N+—→ N^3-` 


Name:

a metal whose oxide is reduced only by carbon


Which metals do not corrode easily?


Three experiments to study the process of rusting are given below. Observe the three test tubes and answer the following questions.

  1. Why the nail in the test tube 2 is not rusted?
  2. Why is the nail in the test tube 1 is rusted highly?
  3. Would the nail in the test tube 3 get rusted?

Which metal occurs as a sulphide also gives the name of their respective ore.


A metallic oxide which cannot be reduced by normal reducing agents:


Geeta dipped a copper coin in a solution of silver nitrate. After some time she saw the silver shine on the coin. Why? Give the balanced chemical equation for the same and name the type of reaction.

Give reason for the following:

Potassium reacts vigorously with cold water while copper does not react with water or steam.


Give reason for the following:

Rusting reduces the structural strength of iron.


Select the appropriate option for the following statement:

The element placed in the extreme left of the Modern Periodic Table.


Find the odd one out and give its explanation.


Which non-metal is essential for our life and all living beings?


Paheli bought a statue made up of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.


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