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Halogenation of Alpha Carbon

1)Calculate n...

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1)Calculate n -factor for Al2O3 for the following reaction. Al(excess) +O2 Al2O3 2)If x gram of Al2O3 is formed ,y gram of Al is consumed in the reaction .Find realtion between x and y.( Use concept of gram equivalent).

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Q. If 1.5 moles of oxygen combines with

A l

A l_{2} O_{3},

A l

in gram (atomic mass of

A l = 27

) used in the reaction is :

Q. In the reaction:

2 A l + C r_{2} O_{3} \to A l_{2} O_{3} + 2 C r

4.98

A l

20.0

C r_{2} O_{3}

. How much grams of reactant remains at the completion of the reaction?

10 g

A l

is used for reduction in each of the following alumino thermic reactions, which reaction would generate more heat and by how much ?
a.

2 A l + C r_{2} O_{3} \to A l_{2} O_{3} + 2 C r

2 A l + F e_{2} O_{3} \to A l_{2} O_{3} + 2 F e

Standard heat of formation of

A l_{2} O_{3}

C r_{2} O_{3}

F e_{2} O_{3}

- 1676 k J

- 1141 k J

- 822.2 k J

, respectively.

A l

K C l O_{3}

react together to form

A l_{2} O_{3}

2 K C l O_{3} ⟶ 2 K C l + 3 O_{2}

4 A l + 3 O_{2} ⟶ 2 A l_{2} O_{3}

4

K C l O_{3}

50 %

pure) on reaction with excess of

A l

forms x moles of

A l_{2} O_{3}

. The value of x (as nearest integer) is:

A l

K C l O_{3}

react together to form

A l_{2} O_{3}

according to the following reactions :

2 K C l O_{3} ⟶ 2 K C l + 3 O_{2}

4 A l + 3 O_{2} ⟶ 2 A I_{2} O_{3}

4

K C l O_{3}

50 %

pure) on reaction with excess of Al forms _______ moles of

A l_{2} O_{3}

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