Advertisements
Advertisements
प्रश्न
State two important uses of following metal
Uses of mercury
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.
APPEARS IN
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?