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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

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

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प्रश्न

Mention two uses of the following metals and non-metals  

Gold 

एका वाक्यात उत्तर

उत्तर

It is used for making ornaments and coins.
It is used in the manufacture of electronic devices like computers, telephones, home appliances, etc.

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पाठ 6: Metals and Non-metals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 6 Metals and Non-metals
Exercise | Q 3.3

संबंधित प्रश्‍न

What happens when Dilute sulphuric acid is poured on a copper plate?

Write word equations of the reactions involved.


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

Write word equations of the reactions involved.


State one use of Mercury.


Name an alloy of lead and tin.


What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.


Give reasons 

Gold is mixed with copper and nickel.  


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

Silver is used to make electric cables.


Statements given below are incorrect. Write the correct statements : 

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


State the position of the following in the periodic table:

Alkaline earth metals


Give the general characteristics of:

Alkali metals,

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


Write name.

Molecular formula of the common ore of aluminium.


Write name.

The nonmetal having electrical conductivity.


Write scientific reason.

Sodium is always kept in kerosene.


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

Silver


Halogen reacts with acid.


Can you store pickle in an aluminium utensil? Give reason.


Which of the following metals are obtained by electrolysis of their chlorides in molten state?

  1. Na
  2. Ca
  3. Fe
  4. Cu

Which of the following metals can displace the other two metals from their salt solutions? 

Zinc iron copper

In the given 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. 

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