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प्रश्न
Mention two uses of the following metals and non-metals
Gold
उत्तर
It is used for making ornaments and coins.
It is used in the manufacture of electronic devices like computers, telephones, home appliances, etc.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Brass is an alloy of copper and .........
How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
What is meant by 22 carat gold? Name the metals which are usually alloyed with gold to make it harder.
Which of the following alloys contains mercury as one of the constituents?
(a) stainless steel
(b) solder
(c) duralumin
(d) zinc amalgam
Give reasons
Magnesium is used in fire works.
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 ________
State two important uses of following metal
Uses of magnesium
Write name.
Alloy of sodium with mercury.
Write scientific reason.
Anodes need to be replaced from time to time during the electrolysis of alumina.
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:
Aluminium
Name the following:
A halogen which is a solid at room temperature.
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
Name two major non-metals which are present in fertilisers and enhance the growth of plants.
The metal can be cut with a knife ______.
Metals and non–metals are used for making ______, ______ and ______.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
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 not solid at room temperature?
