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प्रश्न
Mention two uses of the following metals and non-metals
Iodine
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उत्तर
It is used in photographic films in the form of potassium iodide.
It is added to salt to make it iodized salt which is necessary for the growth of human body.
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संबंधित प्रश्न
State one use of the following metal:
Copper
Name two alloys of iron. What elements are present in these alloys?
What is an alloy?
How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
What is an alloy?
How are the properties of an alloy different from those of the constituent elements?
Give reasons
Graphite is used in the leads of pencils
Fill in the blank
_______ is a soft metal.
Aluminium is not used to make :
Write ‘True’ or ‘False’ in front of following statement.
Magnesium is used in making light weight alloys of aluminium.
Write name.
Alloy of sodium with mercury.
Write name.
The oxide that forms salt and water by reacting with both acid and base.
With reference to the following metals state their use in daily life metal:
iron
State why telegraph poles are painted with aluminium paint.
Name the following:
A metal used in packaging.
The minerals from which the metal can be separated economically are called _______.
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.
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
- Na
- Ca
- Fe
- Cu
The metal can be cut with a knife ______.
Why are metalloids called semimetals?
