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When intimate mixture of potassium dichromate and potassium chloride is heated with conc. H2SO4 which of the following is produced in the form of red vapours?

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Important Questions on The d and f-Block Elements

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Which one of the following pairs of ions have the same electronic configuration?
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The reducing nature of any metal in aqueous solution depends upon
a. Enthalpy of atomisation
b. Ionisation enthalpies
c. Hydration energy
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The magnetic moment of a transition metal ion is found to be 5.92BM. The number of unpaired electrons present in it is
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Which of the following is non-typical transition element?
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n-factor of KMnO4 in neutral medium is
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$\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{I}^{-}+\mathrm{H}^{+} \longrightarrow$ Oxidized product. The product is
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Which of the following is coloured due to charge transfer?
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Cr2O72-+XH+Cr3++H2O+ oxidised product of X.

X in the above reaction cannot be