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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Give Reasons Aluminium is Used in Making Aircrafts.

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प्रश्न

Give reasons  

Aluminium is used in making aircrafts.  

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उत्तर

Aluminium is used in making aircrafts because it is light and strong. It is mixed with other metals to make it stronger.

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पाठ 6: Metals and Non-metals - Exercise

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एस.पी. सिंह Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Exercise | Q 4.2

संबंधित प्रश्‍न

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

Generally, non-metals react with acids. ( )


What is a thermite reaction? Explain with the help of an equation.


Tick (√) the most appropriate answer. 

Graphite is used :


State two important uses of following metal:

Uses of aluminium


State two important uses of the following metal. 

Uses of magnesium  


State two important uses of following metal

Uses of mercury  


State the position of the following in the periodic table:

Alkaline earth metals


Write name.

Molecular formula of the common ore of aluminium.


Write name.

The nonmetal having electrical conductivity.


Write scientific reason.

Anodes need to be replaced from time to time during the electrolysis of alumina.


The electronic configuration of metal ‘A’ is 2,8,1 and that of metal ‘B’ is 2,8,2. Which of the two metals is more reactive? Write their reaction with dilute hydrochloric acid.


What is it made from? Why?

Electric cables


Name the following:

A metal used in flexible pipes.


A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.


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


The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?


Give an example of a metal which

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

In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.

  1. ______  is a metal.
  2. Metals are good ______ of electricity. 

Sodium is a hard metal. 


Compare the conductivity of metals and non–metals.


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