12.33. A sample of 0.50 g of an organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in 50 ml of 0.5M H₂SO₄. The residual acid required 60 ml of 0.5 M solution of NaOH for neutralization. Find the percentage composition of nitrogen in the compound.

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 -