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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Fill in the Blank : the Most Ductile Metal Is .................... - Chemistry

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प्रश्न

Give two uses of Germanium  

टीपा लिहा

उत्तर

  • Germanium is used as a semiconductor.
  • It is used as a transistor in many electronic applications when mixed with arsenic, gallium, antiomony, etc.
  • Germanium is also used to form alloys and as a phosphor in fluorescent lamps
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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 8.4

संबंधित प्रश्‍न

State five uses of metals


State one use of Copper.


State one use of Silver.


Fill in the following blank with suitable word:

The alloy in which one of the metals is mercury is called an ...............


What is an alloy? How is an alloy made?


What elements are present in steel? How are the properties of steel different from those of pure iron?


 For the reduction of metal oxide, suggest a reducing agent other than carbon.


Give reasons 

Graphite is used in the leads of pencils  


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

Iodine acts as an antiseptic in the form of a tincture of iodine. 


Statements given below are incorrect. Write the correct statements : 

Zinc is used for making power transmission wires.  


State two important uses of following metal 

Uses of tin  


State the position of the following in the periodic table:

Iron and zinc


Give the general characteristics of:

Alkali metals,

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


When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of a chemical equation.


Complete the following flowchart.


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


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. 

Silver and copper are very good conductors of electricity.


Why are metalloids called semimetals?


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

______ is the metallic element.


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