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प्रश्न
Give reasons
Magnesium is used in fire works.
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उत्तर
Magnesium is used in fire works because it bums with a dazzling light.
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संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Generally, non-metals react with acids. ( )
State one use of Copper.
What is an alloy? Give two examples of alloys.
Give reasons
Graphite is used in the leads of pencils
Write ‘true’ or ‘false’ for the following statement.
Iodine acts as an antiseptic in the form of a tincture of iodine.
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Tick (√) the most appropriate answer.
Graphite is used :
Name a metal which is not malleable :
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Write name.
Alloy of sodium with mercury.
Write scientific reason.
Pine oil is used in froth flotation.
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With reference to the following metals state their use in daily life metal:
iron
Give a reason why a green deposit is seen on the surface of an article of copper
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What is ductility?
Which of the following property is generally not shown by metals?
Which one of the following metals do not react with cold as well as hot water?
Metals are usually solids or gases at room temperature.
Compare the conductivity of metals and non–metals.
