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प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Magnesium is used in making light weight alloys of aluminium.
विकल्प
True
False
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उत्तर
True.
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संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
Which of the following alloys contains mercury as one of the constituents?
(a) stainless steel
(b) solder
(c) duralumin
(d) zinc amalgam
Mention two uses of the following metals and non-metals
Iodine
Give the general characteristics of:
Alkali metals,
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
What is it made from? Why?
A pair of tongs.
With reference to the following metals state their use in daily life metal:
Aluminium
With reference to the following metals state their use in daily life metal:
Lead
State why telegraph poles are painted with aluminium paint.
State a specific reason for using copper in electrical cables
Name the following:
A halogen which is a solid at room temperature.
Write the name.
Two highly reactive metals-
The ability of metals to be drawn into thin wire is known as
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
- Na
- Ca
- Fe
- Cu
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.
- ______ is a metal.
- Metals are good ______ of electricity.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
Which metal has the highest ductility?
