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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
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Generally, non-metals react with acids. ( )
What is an amalgam?
Name two alloys of iron. What elements are present in these alloys?
Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.
Give reasons
Aluminium is used in making aircrafts.
Write ‘true’ or ‘false’ for the following statement.
Iodine acts as an antiseptic in the form of a tincture of iodine.
State two important uses of following metal:
Uses of aluminium
Give the general characteristics of:
Alkali metals,
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
With reference to the following metals state their use in daily life metal:
iron
Aluminium: _______: gold : : electric insulator
Assertion: Mercury is solid in room temperature.
Reason: Mercury is a non-metal.
Which of the following property is generally not shown by metals?
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
- Na
- Ca
- Fe
- Cu
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
______ is the first scientist who used the term element.
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
Which of the following metals can displace the other two metals from their salt solutions?
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
Metal atoms tend to have a maximum of ______ electrons in the outermost shell.
