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प्रश्न
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
उत्तर
A metal that gives dazzling effect to crackers when they explode is magnesium.
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संबंधित प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
What happens when Dilute sulphuric acid is poured on a copper plate?
Write word equations of the reactions involved.
Fill in the following blanks with suitable words:
A metal having low melting point is ..................... but a non-metal having very high melting point is ..............
State one use of Gold.
What is an alloy? Give two examples of alloys.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
______ is a liquid metal.
State two important uses of following metals:
Uses of iron
State the position of the following in the periodic table:
Aluminium
Write scientific reason.
Anodes need to be replaced from time to time during the electrolysis of alumina.
Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Write name of any element present in the same group as X
What was Mendeleev's basis for the classification of elements?
State the position of the following in the periodic table:
Halogens
What is it made from? Why?
Ornaments
Give a reason why a green deposit is seen on the surface of an article of copper
Name the following:
The most reactive halogen.
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?
Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)
Which of the following metals can displace the other two metals from their salt solutions?
| Zinc | iron | copper |
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
