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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

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

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प्रश्न

Give two uses of Germanium  

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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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अध्याय 6: Metals and Non-metals - Exercise

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एस पी सिंग Concise Chemistry [English] Class 7 ICSE
अध्याय 6 Metals and Non-metals
Exercise | Q 8.4

संबंधित प्रश्न

Give reasons for the following.

Copper cannot displace zinc from its salt solution.


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

Write word equations of the reactions involved.


State one use of the following metal:

Silver


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


Give reasons  

Aluminium is used in making aircrafts.  


Give reasons 

Graphite is used in the leads of pencils  


Give reasons 

Gold is mixed with copper and nickel.  


Fill in the blank 

A metal that gives dazzling effect to crackers when they explode is ______


Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride 

A solution of a metal in mercury is called ________


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

Silver


Name the following:

The most reactive halogen.


Write the name.

Two highly reactive metals-


Complete the following flowchart.


What is ductility?


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


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?


Name two soft metals which can be cut with a knife.


The typical shine of metals is called ______.


Match the following

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

Which metals are liquid at room temperature?


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