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प्रश्न
With reference to the following metal state its use in daily life:
Magnesium
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उत्तर
- It is used in fireworks as it burns with a dazzling light.
- Photography: Magnesium produces a bright flash. It is used in strip form.
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संबंधित प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
Write the name and formulae of a metal hydride.
Fill in the following blank with suitable word:
Brass is an alloy of copper and .........
What is an alloy? How is an alloy made?
Mention two uses of the following metals and non-metals
Aluminium
Write ‘True’ or ‘False’ in front of following statement.
Magnesium is used in making light weight alloys of aluminium.
State two important uses of following metal
Uses of mercury
Write scientific reason.
Sodium is always kept in kerosene.
What was Mendeleev's basis for the classification of elements?
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
State a specific reason for using copper in electrical cables
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
An amorphous substance which turns from pale green to black on strong heating evolving a colourless, acidic gas as the only gaseous product.
The minerals from which the metal can be separated economically are called _______.
Complete the following flow chart.
The metal which is liquid at room temperature is ______.
An element which is always lustrous, malleable and ductile is ______.
Give reasons for the following.
- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
Which of the following metals can displace the other two metals from their salt solutions?
