Which of the following reactions of `Al` is known as the thermite reaction?A. Reaction with `N_(2)`B. Reaction with `O_(2)`C. Reaction with `NH_(3)`D. Reaction with `NaOH`

Which of the following reactions of `Al` is known as the thermite reac

1.	Which of the following reactions of `Al` is known as the thermite reaction?A. Reaction with `N_(2)`B. Reaction with `O_(2)`C. Reaction with `NH_(3)`D. Reaction with `NaOH`
Answer» Correct Answer - B In thermite reaction, `Al` burns readily in air or oxygen. The rection is strongly exothermic: `2Al(s) + (3)/(2) O_(2)(g) rarr Al_(2)O_(3) + "Energy", Delta_(T)H^(@)` `= -1670 kJ mol^(-1)` It evolves so much heat energy that it can be dangerous as the `Al` becomes white hot and often causes fire. The very strong affinity of `Al` for oxygen is used in the metallurgical extraction of other metals from their oxides: `8Al + 3Mn_(3)O_(4) rarr 4Al_(2)O_(3) + 9Mn` `2Al + Cr_(2)O_(3) rarr Al_(2)O_(3) + 2Cr`

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Which of the following reactions of `Al` is known as the thermite reaction?A. Reaction with `N_(2)`B. Reaction with `O_(2)`C. Reaction with `NH_(3)`D. Reaction with `NaOH`

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