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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
Write the name and formula of a metal hydride.
State one use of the following metal:
Copper
The atomic number of an element Y is 16.
- What must an atom of Y do to achieve the nearest inert gas electron arrangement?
- Which inert gas is nearest to Y?
What is an alloy?
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Name a metal which is not malleable :
State two important uses of following metal:
Uses of silver
State two important uses of following metal
Uses of lead
Write scientific reason.
Generally the ionic compounds have high melting points.
What is it made from? Why?
Ornaments
State why telegraph poles are painted with aluminium paint.
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.
Write scientific reason.
Meena’s mother uses lemon or tamarind for cleaning copper vessels turned greenish.
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.
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
The liquid metal at room temperature ______.
The metal can be cut with a knife ______.
Metals and non–metals are used for making ______, ______ and ______.
