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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

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

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प्रश्न

Mention two uses of the following metals and non-metals 

Aluminium  

एक पंक्ति में उत्तर

उत्तर

It is used to make electric wires.
It is used to make utensils, cans, window fram’es, 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 3.2

संबंधित प्रश्न

Give reasons for the following.

Sodium and potassium are stored in kerosene.


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

Silver is used to make electric cables.


Name a metal which is not malleable : 


State the position of the following in the periodic table:

Iron and zinc


Write name.

The oxide that forms salt and water by reacting with both acid and base.


Write scientific reason.

Sodium is always kept in kerosene.


 Match the alloys given in column I to the uses given in column II : 

Column I Column II
(i) Duralumin  A. Electrical fuse
(ii) Solder B. Surgical instruments 
(iii) Brass  C. Aircraft body 
(iv) Stainless Steel   D. Decorative articles

 


What is it made from? Why?

A pair of tongs.


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

Aluminium


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

Lead


Name the following:

A metal used in flexible pipes.


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.

An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.


Compare the properties of metals and nonmetals. Give three examples for each.


Higher Order Thinking Skills.

Aakash noticed that the metal latch on gate was difficult to open during hot sunny days. However, it was not difficult to open the same latch at night. Aakash observed that the latch and the gate are exposed to the sun during day time.

  1. Formulate a hypothesis based on the information provided.
  2. Briefly state how you would test the hypothesis.

Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?


The ability of metals to be drawn into thin wire is known as


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)


Give an example of a metal which

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

Why are bells made of metals?


X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

Metal atoms tend to have a maximum of ______ electrons in the outermost shell.


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