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Question
Write the formula for the following compound:
Chromium(III) oxide
Solution
Cr2O3
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RELATED QUESTIONS
Choose the correct option.
Which of the following is not an example of redox reaction?
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The overall formation constant for the reaction of 6 mol of CN- with Cobalt (II) is 1 × 1019. The formation constant for the reaction of 6 mol of CN- with Cobalt (III) is ______ × 1063. Given that,
\[\ce{CO(CN)^{- 3}_6 + e^-1 -> Co(CN)^{-4}_6}\]
\[\ce{E^{\circ}_{R_p}}\] = 0.83 V
\[\ce{Co^{+3} + e^{- 1} -> Co^{+2}}\]
\[\ce{E^{\circ}_{R_p}}\] = 1.82 V
A 50 L gas stream was passed through a solution containing Cd2+ where H2S (in gas stream) was retained as CdS. The mixture was acidified and treated with 50 ml of 0.004 M I2. After the reaction \[\ce{S^{2-} + I2 -> S(s) + 2I-}\] was complete, the excess iodine was treated with 15 ml of 0.01 M thiosulphate. The concentration of H2S in ppm will be ______. Use density of gas stream = 1.7 gm/L.
A 10 ml of (NH4)2 SO4 was treated with an excess of NaOH. The evolved NH3 gas absorbed in 50 ml of 0.1 N HCl. 20 ml of 0.1 N NaOH was required to neutralise the remaining HCl. The strength of (NH4)2 SO4 in the solution is ______ g/L.
