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General Principles and processes of Isolation of Elements
hard
The correct statement regarding the given Ellingham diagram is
A
At $1400\,^oC,$ $Al$ can be used for the extraction of $Zn$ from $ZnO$
B
At $500\,^oC,$ coke can be used for the extraction of $Zn$ from $ZnO$
C
Coke cannot be used for the extraction of $Cu$ from $Cu_2O$
D
At $800\,^oC$ $Cu$ can be used for the extraction of $Zn$ from $ZnO$
(JEE MAIN-2019)
Solution
$4Al + 6ZnO\,\to 2Al_2O_3 + 6Zn$
$\Delta H$ for the above reaction is $-ve.$
Standard 12
Chemistry
Similar Questions
Match List $I$ with List $II.$
| List $I$ | List $II$ |
| $A.$ Siderite | $I.$ $Fe CO _{3}$ |
| $B.$ Malachite | $II.$ $CuCO _{3} \cdot Cu ( OH )_{2}$ |
| $C.$ Sphalerite | $III.$ $ZnS$ |
| $D.$ Calamine | $IV.$ $ZnCO _{3}$ |
Choose the correct answer from the options given below
