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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
What happens when Iron nails are placed in copper sulphate solution?
Write word equations of the reactions involved.
State one use of Copper.
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
Magnesium is used in fire works.
State the position of the following in the periodic table:
Alkali metals
Give the general characteristics of:
Alkali metals,
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Why is hydrogen placed with alkali metals?
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
Match the alloys given in column I to the uses given in column II :
| Column I | Column II |
| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
With reference to the following metal state its use in daily life:
Magnesium
With reference to the following metals state their use in daily life metal:
Lead
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
Name the following:
A metal used in flexible pipes.
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
The ability of metals to be drawn into thin wire is known as
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
Metals are ______ conductors of heat and electricity.
All gases are ______.
