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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
State one use of Silver.
The atomic number of an element Y is 16.
(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?
(b) Which inert gas is nearest to Y?
Fill in the following blank with suitable word:
The alloy in which one of the metals is mercury is called an ...............
What elements are present in steel? How are the properties of steel different from those of pure iron?
For the reduction of metal oxide, suggest a reducing agent other than carbon.
Mention two uses of the following metals and non-metals
Oxygen
Mention two uses of the following metals and non-metals
Iodine
Give reasons
Aluminium is used in making aircrafts.
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
Aluminium is not used to make :
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
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:
Aluminium
With reference to the following metal state its use in daily life:
Magnesium
Give a reason why a green deposit is seen on the surface of an article of copper
The minerals from which the metal can be separated economically are called _______.
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Which of the following is not a metal?
In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.
- ______ is a metal.
- Metals are good ______ of electricity.
Metals have high melting points.
