मराठी
सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State Two Important Uses of Following Metal Uses of Mercury

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प्रश्न

State two important uses of following metal

Uses of mercury  

टीपा लिहा
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उत्तर

Uses of mercury :

  • It is used as a thermometric liquid in laboratory as well as clinical thermometers.
  • Gold amalgam and silver amalgam are used in dentistry for filling tooth cavities.
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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 3.1

संबंधित प्रश्‍न

State five uses of metals.


What elements are present in steel?


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


What is meant by 22 carat gold?


Statements given below are incorrect. Write the correct statements : 

Aluminium is best conductor of electricity.   


Write scientific reason.

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


State the position of the following in the periodic table:

Halogens


Give a reason why a green deposit is seen on the surface of an article of copper


Give a reason why iron objects rust easily but the iron pillar at Qutab Minar has not rusted over the years.


Name the following:

A halogen which is a solid at room temperature.


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.


Complete the following flowchart.


Which of the following property is generally not shown by metals?


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


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


The typical shine of metals is called ______.


Match the following

i. Softest metal a. Copper
ii. Hardest metal b. Sodium
iii. Hardest non–metal c. Osmium
iv. Ductility d. Diamond

Which metals are not solid at room temperature?


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