The angular momentum of an electron depends on

The enthalpy change $\left( \Delta H \right)$ for the reaction,$N_{2(g)} + 3H_{2(g)} \to 2NH_{3(g)}$ is $-92.38 \ kJ$ at $298 \ K$. The internal energy change $\left( \Delta U \right)$ at $298 \ K$ is ........ $kJ$.

An achromatic combination of lenses produces

Phosgene is formed slowly from which one of the following on exposure to air and sunlight?

Which of the following is the weakest base?

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