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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
State one use of the following metal:
Aluminium
The alloy in which one of the metals is mercury is called an ______.
The electrical conductivity and melting point of an alloy is ______ than that of pure metals.
Mention two uses of the following metals and non-metals
Oxygen
Write ‘true’ or ‘false’ for the following statement.
Iodine acts as an antiseptic in the form of a tincture of iodine.
Tick (√) the most appropriate answer.
Graphite is used :
State two important uses of following metals:
Uses of iron
State the position of the following in the periodic table:
Alkali metals
State the position of the following in the periodic table:
Aluminium
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
Give reasons for the following:
Most metals conduct electricity well.
With reference to the following metals state their use in daily life metal:
copper
With reference to the following metals state their use in daily life metal:
Lead
When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of a chemical equation.
Complete the following flowchart.
An element which is always lustrous, malleable and ductile is ______.
The ability of metals to be drawn into thin wire is known as
______ is the first scientist who used the term element.
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.
The liquid metal at room temperature ______.
