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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State Two Important Uses of Following Metal Uses Of Magnesium - Chemistry

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प्रश्न

State two important uses of following metal 

Uses of magnesium  

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उत्तर

Uses of magnesium :

  • It bums with dazzling white flame and hence is used in fire works.
  • It is used in the making of alloys, such as magnalium. This alloy is used in making frame of aeroplanes.
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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 3.09

संबंधित प्रश्‍न

Give reasons for the following.

Sodium and potassium are stored in kerosene.


What happens when Iron nails are placed in copper sulphate solution?

Write word equations of the reactions involved.


State one use of Silver.


State one use of Gold.


How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?


What is an alloy? Give two examples of alloys.


State two important uses of following metal 

Uses of copper  


Give the general characteristics of:

Alkaline earth metals with reference to

(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid


Why are alkali metals kept in kerosene oil?


Write name.

Molecular formula of the common ore of aluminium.


Write scientific reason.

Pine oil is used in froth flotation.


Name the following:

A metal used in flexible pipes.


Write the name.

Two highly reactive metals-


Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.


Give reasons for the following.

  1. Aluminum foils are used to wrap food items.
  2. Immersion rods for heating liquids are made up of metallic substances.
  3. Sodium and potassium are stored in kerosene.
  4. Mercury is used in thermometers.

Why are bells made of metals?


Sodium is a hard metal. 


Match the following

i. Silica a. Caustic potash
ii. Potassium hydroxide b. Sand
iii. Sodium hydroxide c. Calamine
iv. Zinc carbonate d. Caustic soda

Why do metals appear shiny?


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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