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प्रश्न
Mention two uses of the following metals and non-metals
Oxygen
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उत्तर
It is used by all living beings for breathing.
It is important for combustion.
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संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
Fill in the following blanks with suitable words:
A metal having low melting point is ..................... but a non-metal having very high melting point is ..............
Give the composition of an alloy called solder. State its one property and one use.
Fill in the following blank with suitable word:
Brass is an alloy of copper and .........
Give reasons
Graphite is used in the leads of pencils
Give two uses of Germanium
Give the general characteristics of:
Alkaline earth metals with reference to
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Why is hydrogen placed with alkali metals?
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
State the position of the following in the periodic table:
Halogens
What is it made from? Why?
A pair of tongs.
Name the following:
The most reactive halogen.
The minerals from which the metal can be separated economically are called _______.
Halogen reacts with acid.
Complete the following flow chart.
Which one of the following is an example for a metal?
The most abundant metal in the earth’s crust is ____________.
Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?
Name two soft metals which can be cut with a knife.
Which of the following metals can displace the other two metals from their salt solutions?
