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Yogita Ingle 5 years, 11 months ago
The substance that undergo oxidation itself and reduce other is called reducing agent whereas the substance that undergo reduction itself and oxidize other is called oxidizing agent.
For example:- CuO + H2 --> Cu + H2O
Copper Oxide Hydrogen Copper Water
In reaction, Cu is undergoing reduction and oxidizing hydrogen. Therefore, Cu is oxidizing agent and H is reducing agent.
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Posted by Jivisha Srivastava 5 years, 11 months ago
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Aayu... A?V 5 years, 11 months ago
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Posted by Kuthman-2 Rait 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
|
|
Properties |
Alkaline earth metals |
Alkali metals |
|
1. |
Physical properties |
Comparatively harder. High melting points. Diamagnetic. |
Soft, low melting points paramagnetic. |
|
2. |
Valency |
Bivalent |
Monovalent |
|
3. |
Electropositive nature |
Less electropositive |
More electropositive |
|
4. |
Hydroxides |
Weak bases, less soluble and decompose on heating. |
Strong bases, highly soluble and stable towards heat. |
|
5. |
Bicarbonates |
These are not known in free state. Exist only in solution. |
These are known in solid state. |
|
6. |
Carbonates |
Insoluble in water. Decompose on heating. |
Soluble in water. Do not decompose on heating (LiCO3 is an exception) |
|
7. |
Action of carbon |
Directly combine with carbon and form carbides |
Do not directly combine with carbon |
|
8. |
Solubility of salts |
Sulphates, phosphates fluorides, chromates, oxalates etc are insoluble in water |
Sulphates, phosphates, fluorides, chromates, oxides etc are soluble in water. |
|
9. |
Reducing power |
Weaker as ionization potential values are high and oxidation potential values are low. |
Stronger as ionization potential values are low and oxidation potential values are high |
|
10. |
Electronic configuration |
Two electrons are present in the valency shall. The configuration is ns2 (bivalent) |
One electron is present in the valency shell. The configuration is ns1 (monovalent) more electropositive |
Posted by Dhananjay Thakur 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
The metals of group 7, 8, and 9 do not form hydrides. This region is referred as Hydride gap in modern periodic table. These metals have low affinity for hydrogen in their normal oxidation state.
For eg.- Mn, Fe, Co, Rh, Hf, W, Os etc
Posted by Khushi Bhalakiya ? 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Chemistry is the branch of science which deals with the composition, structure and properties of matter. Antoine Laurent Lavoisier is called the father of chemistry.
Posted by Vikas Rav 5 years, 11 months ago
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Aayu... A?V 5 years, 11 months ago
Posted by Deepak Raja 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
All liquids can evaporate at room temperature. Petrol, or gasoline, evaporates faster than most liquids because of its weak intermolecular attractions. Petrol is a mixture of hydrocarbons with the main constituent being octane, C8H18. Octane is a non-polar molecule. The only intermolecular attractions it has are weak dispersion forces. The molecules have a range of kinetic energies, and those with the most kinetic energy escape at the surface and enter the gas phase.
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Farhat Shaikh Shaikh 5 years, 11 months ago

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Bakhtawar Saifi 5 years, 11 months ago
1Thank You