Which metal is used in thermite process because of its activity:
Correct answer: C. Al
- A. Fe
- B. Cu
- C. Al
- D. Zn
Explanation
Al has a high affinity for oxygen It readily removes oxygen from Oxides of less reactive metals so it is used in thermite processWhen a piece of aluminium sheet is exposed to moist air it acquires a thin,continuous coating of aluminium oxide, which prevents further attack onthe metal by atmospheric oxygen and water under normal conditions.Because of this aluminium sheets are said to be corrosion-free. However,if the aluminium powder is heated to 800°C and above, the metal will react with air to form aluminium oxide, Al2O3. Thereaction is accompanied by the evolution of heat and intense white light.This property of aluminium is made use of in flash light photography,
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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