Question : 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

Question : a) What is thermite reaction ? b) Q is an element which is

1.	Question : 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
Answer» Solution : 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.