Heating a mixture of chromite are (FeOCr2O3) & K2CO3 in air is to manufacture:
Correct answer: E. K2CrO4
- A. K2MnO4
- B. K2Cr2O7
- C. KMnO4
- D. Kl
- E. K2CrO4
Explanation
Heating a mixture of chromite (FeCr2O4) and K2CO3 (not KCO3 as mentioned in the question) in air is done to manufacture option (e): K2CrO4, also known as potassium chromate.The reaction that occurs during this process is as follows:4 FeCr2O4 + 8 K2CO3 + 7 O2 → 8 K2CrO4 + 2 Fe2O3 + 8 CO2Therefore, the correct answer is option E: K2CrO4.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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