Which of the following is an amphoteric oxide?
- A$V_{2}O_{5}, Cr_{2}O_{3}$
- B$Mn_{2}O_{7}, Cr_{2}O_{3}$
- C$CrO, V_{2}O_{5}$
- D$V_{2}O_{5}, V_{2}O_{4}$
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Iodine is formed when potassium iodide reacts with a solution of
Medium
View Solution$KMnO_4$ is the oxo-salt of the acid of which of the following oxides?
Medium
View SolutionConsider the following chemical reactions involved in the extraction of chromium from chromite ore:
$(a)$ $4FeCr_2O_4 + X_1 + 7O_2 \to 8Na_2CrO_4 + 2Fe_2O_3 + 8CO_2$
$(b)$ $2Na_2CrO_4 + X_2 \to Na_2Cr_2O_7 + 2Na^+ + H_2O$
Identify the species $X_1$ and $X_2$ in the reactions.
$(a)$ $4FeCr_2O_4 + X_1 + 7O_2 \to 8Na_2CrO_4 + 2Fe_2O_3 + 8CO_2$
$(b)$ $2Na_2CrO_4 + X_2 \to Na_2Cr_2O_7 + 2Na^+ + H_2O$
Identify the species $X_1$ and $X_2$ in the reactions.
Medium
View SolutionWhich of the following statements is incorrect for $KMnO_4$?
Provide the structures of the following ions:
$1.$ $CrO_4^{2-}$
$2.$ $Cr_2O_7^{2-}$
$1.$ $CrO_4^{2-}$
$2.$ $Cr_2O_7^{2-}$
Medium
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