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प्रश्न
Mention two uses of the following metals and non-metals
Iodine
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उत्तर
It is used in photographic films in the form of potassium iodide.
It is added to salt to make it iodized salt which is necessary for the growth of human body.
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संबंधित प्रश्न
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
What happens when Dilute sulphuric acid is poured on a copper plate?
Write word equations of the reactions involved.
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The atomic number of an element X is 12.
(a) What must an atom of X do to attain the nearest inert gas electron configuration?
(b) Which inert gas is nearest to X?
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Mention two uses of the following metals and non-metals
Oxygen
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Silver is used to make electric cables.
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Brass is an alloy of copper and zinc and has lustrous yellow colour.
Tick (√) the most appropriate answer.
Graphite is used :
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Uses of aluminium
State two important uses of following metal
Uses of lead
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
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| 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 |
The minerals from which the metal can be separated economically are called _______.
Write the name.
Two highly reactive metals-
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
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)
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.
The typical shine of metals is called ______.
