Advertisements
Advertisements
प्रश्न
State two important uses of following metal
Uses of mercury
Advertisements
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
Give the composition of an alloy called solder. State its one property and one use.
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
Write name.
The reagent that dissolves noble metals.
Match the alloys given in column I to the uses given in column II :
| Column I | Column II |
| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
Give reasons for the following:
Most metals conduct electricity well.
With reference to the following metals state their use in daily life metal:
copper
With reference to the following metals state their use in daily life metal:
Lead
Give a reason why a green deposit is seen on the surface of an article of copper
State a specific reason for using copper in electrical cables
Soft metal : Na : : hard metal : _______
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
An element which is always lustrous, malleable and ductile is ______.
Compare the properties of metals and nonmetals. Give three examples for each.
Can you store pickle in an aluminium utensil? Give reason.
Which of the following property is generally not shown by metals?
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?
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
The metals which are found in both free state as well as combined state are ______.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
Metal atoms tend to have a maximum of ______ electrons in the outermost shell.
