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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
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Sodium is a very reactive metal. ( )
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Copper displaces zinc from zinc sulphate solution. ( )
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 ..............
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State two important uses of following metal
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Hydrochloric acid,
Write name.
Molecular formula of the common ore of aluminium.
Write name.
The device used for grinding an ore.
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AgNO3 + Nacl → AgCl + NaNO3
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| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
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Name the following:
The most reactive halogen.
Name the following:
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Name the following:
A halogen which is a solid at room temperature.
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A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.
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X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
Metal atoms tend to have a maximum of ______ electrons in the outermost shell.
