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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

State Two Important Uses of Following Metal Uses of Mercury - Chemistry

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प्रश्न

State two important uses of following metal

Uses of mercury  

टिप्पणी लिखिए

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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अध्याय 6: Metals and Non-metals - Additional questions 2

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 6 Metals and Non-metals
Additional questions 2 | Q 3.1

संबंधित प्रश्न

Mark ‘T’ if the statement is true and ‘F’ if it is false.

Generally, non-metals react with acids. ( )


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

Write word equations of the reactions involved.


What is an amalgam?


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


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 ________


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


Write scientific reason.

Sodium is always kept in kerosene.


What is it made from? Why?

A pair of tongs.


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

Zinc


The metal which is liquid at room temperature is ______.


What is ductility?


A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.


Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?


Which one of the following four metals would be displaced from the solution of its salts by other three 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

Which metals are liquid at room temperature?


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