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प्रश्न
Mention two uses of the following metals and non-metals
Iron
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उत्तर
It is used to make pipes, tanks, railing, etc.
It is used in the construction of power transmission towers.
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संबंधित प्रश्न
Write two methods of preventing the rusting of iron.
Name any three objects (or structures) which are gradually damaged by the corrosion of iron and steel.
______ and ______ are necessary for the rusting of iron.
What are the special properties of stainless steel?
Which of the following method is used to prevent the accumulation of greenish layer on brass due to corrosion?
Write scientific reason.
Anodization method is useful for prevention of the corrosion of the aluminium.
Write scientific reason.
On exposure to air, silver articles turn blackish after some time.
Write scientific reason.
Coins are made from metals and alloys.
The table shown below gives information about four substances: A, B, C and D.
| SUBSTANCE | MELTING POINT (K) | ELECTRICAL CONDUCTIVITY | |
| SOLID | LIQUID/ AQUEOUS | ||
| A | 295 | Good | Good |
| B | 1210 | Poor | Good |
| C | 1890 | Poor | Good |
| D | 1160 | Poor | Poor |
Identify Ionic compounds from the above given substances.
Explain the following:
Lime water turns milky on passing carbon dioxide gas into it.
