(1): Thermal Decomposition of Potassium Permanganate (KMnO4)
- Heating potassium permanganate (KMnO4) yields potassium manganate (K2MnO4), manganese dioxide (MnO2), and oxygen gas (O2).
- This reaction is utilized in laboratories as an oxygen source.
The thermal decomposition reaction is:
2KMnO4 heat → K2MnO4 + MnO2 + O2
(2): Redox Reaction of Dichromate and Iodide in Acidic Medium
- In an acidic medium, dichromate (Cr2O72−) oxidizes iodide (I−) to iodine (I2).
- The chromium in dichromate is reduced from a +6 oxidation state to +3.
- This reaction adheres to redox balancing principles, maintaining both charge and mass conservation.
The balanced redox reaction is:
Cr2O72− + 6I− + 14H+ → 2Cr3+ + 3I2 + 7H2O
Calculate \( \Lambda_m^0 \) for acetic acid and its degree of dissociation (\( \alpha \)) if its molar conductivity is 48.1 \( \Omega^{-1} \, \text{cm}^2 \, \text{mol}^{-1} \).
Given that
\( \Lambda_m^0 (\text{HC}) = 426 \, \Omega^{-1} \, \text{cm}^2 \, \text{mol}^{-1} \),
\( \Lambda_m^0 (\text{NaCl}) = 126 \, \Omega^{-1} \, \text{cm}^2 \, \text{mol}^{-1} \),
\( \Lambda_m^0 (\text{CH}_3\text{COONa}) = 91 \, \Omega^{-1} \, \text{cm}^2 \, \text{mol}^{-1} \).
Europium (Eu) resembles Calcium (Ca) in the following ways:
(A). Both are diamagnetic
(B). Insolubility of their sulphates and carbonates in water
(C). Solubility of these metals in liquid NH3
(D). Insolubility of their dichlorides in strong HCI
Choose the correct answer from the options given below: