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a) What is thermite reaction ? b) Q i...

a) What is thermite reaction ?
b) Q is an element which is one in copper, zinc, aluminium and iron, its properties are as follows.
i) `Q_(2)O_(3)` is found in nature but not affected by water.
ii) Two chlorides with formula `QCI_(2)` and `QCI_(3)` are formed by the metal. Identify the metal

Text Solution

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a) The displacement reaction which is highly exothermic and the metal produced is in molten state is called thermite reaction.
i). Since the oxide of the metal is `Q_(2)Q_(3)` its valence is 3. therefore out of the mentioned metal only adumimium and iron can be the metal with properties mentioned above.
ii) `QCI_(2)` and `QCI_(3)` must be iron as it shows varible valency of two and three. `FeCl_(2)` and `FeCl_(3)` are the chlorides.
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