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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

With Reference to the Following Metals State Their Use in Daily Life Metal: Zinc

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प्रश्न

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

Zinc

एका वाक्यात उत्तर
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उत्तर

Zinc:

  1. For galvanising iron sheets because Zinc coated iron sheets does not rust.
  2. In Dry cells as Zinc container acts as cathode.
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पाठ 6: Metals and Non-metals - Exercise

संबंधित प्रश्‍न

Mark ‘T’ if the statement is true and ‘F’ if it is false.

Copper displaces zinc from zinc sulphate solution. ( )


A metal having low melting point is ______ but a non-metal having very high melting point is ______.


Name an alloy of lead and tin.


Mention two uses of the following metals and non-metals 

Oxygen


Write ‘true’ or ‘false’ for the following statement : 

Silver is used to make electric cables.


A metal which is neither ductile nor malleable is


Statements given below are incorrect. Write the correct statements : 

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


Statements given below are incorrect. Write the correct statements : 

Aluminium is best conductor of electricity.   


Write ‘True’ or ‘False’ in front of following statement. 

Magnesium is used in making light weight alloys of aluminium. 


Tick (√) the most appropriate answer. 

Graphite is used :


Name a metal which is best conductor of electricity :  


Name the following:

The chemical compound responsible for the green deposit on the surface of articles of copper.


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.

A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.


What is ductility?


Metals are usually solids or gases at room temperature.


Give an example of a metal which

  1. is liquid at room temperature.
  2. is the best conductor of heat.

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


Why do metals appear shiny?


Compare the conductivity of metals and non–metals.


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