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प्रश्न
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
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उत्तर
A metal that gives dazzling effect to crackers when they explode is magnesium.
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संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
A metal having low melting point is ______ but a non-metal having very high melting point is ______.
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?
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
Mention two uses of the following metals and non-metals
Aluminium
Give reasons
Magnesium is used in fire works.
Give reasons
Gold is mixed with copper and nickel.
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
State two important uses of following metal:
Uses of gold
State two important uses of following metal:
Uses of zinc
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
Write scientific reason.
Sodium is always kept in kerosene.
With reference to the following metals state their use in daily life metal:
Zinc
Complete the following flowchart.
An element which is always lustrous, malleable and ductile is ______.
Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?
Why are bells made of metals?
Sodium is a hard metal.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
