Advertisements
Advertisements
प्रश्न
State two important uses of following metal:
Uses of zinc
Mention some important uses of zinc.
Advertisements
उत्तर १
- It is used for galvanizing iron sheets to prevent iron from rusting.
- It is used for making alloys such as brass and bronze.
उत्तर २
- Galvanisation, which is the process of applying a thin layer of zinc to iron sheets to prevent corrosion, is a common application for zinc.
- Galvanic cell electrodes are made from zinc plates and rods.
- Zinc dust and granulated zinc serve as reducing agents. Zinc dust is used in manufacturing dyes, perfumes, and drugs.
- It is employed in Parke’s technique for extracting silver.
- Several alloys, such as brass, German silver, and delta metal (Cu 60%, Zn 38.2%, Fe 1.8%), which are used to make ship propellers, bearings, and valves, are made with it.
Notes
Students should refer to the answer according to their questions.
APPEARS IN
संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
Give a reason for the following:
Alkali metals are good reducing agents.
Give the composition of an alloy called solder. State its one property and one use.
What is an amalgam?
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.
What elements are present in steel?
What is meant by 22 carat gold?
Give reasons
Magnesium is used in fire works.
Tick (√) the most appropriate answer.
Graphite is used :
Give reasons for the following:
Most metals conduct electricity well.
What is it made from? Why?
Pots and pans
With reference to the following metals state their use in daily life metal:
Zinc
State a specific reason for using copper in electrical cables
The metal which is liquid at room temperature is ______.
Which of the following property is generally not shown by metals?
Which of the following is not a metal?
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 |
