12.37. In Lassaigne's test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of:
(a) Na₄[Fe(CN)₆] (b)Fe₄[Fe(CN)₆]₃
(c) Fe₂[Fe(CN)₆] (d)Fe₃[Fe(CN)₆]₄ . (Intermediate)

The standard enthalpy of combustion at 25°C of hydrogen, cyclohexene (C₆H₁₀) and cyclohexane (C₆H₁₂) are –241, –3800 and –3920 kJ mol–1 respectively. Calculate the standard enthalpy of hydrogenation of cyclohexene.

Kindly Consider following table–

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The total number of spectral lines formed when an electron jumps from n₇ → n₁ energy level.

How many faradays are required to reduce 0.1 mole of MnO⁻₄ to Mn+² ?

In the given reaction -