Question

# In which of the following the energy change corresponds to first ionisation potential?

A
XgX+(g)+e
B
2Xg2X+(g)+2e
C
XsX+(g)+e
D
XagX+(ag)+e

Solution

## The correct option is A $$\displaystyle X_{g}\rightarrow X^{+}_{\left ( g \right )}+e$$The energy change for the process $$\displaystyle X_g \rightarrow X_g^+ +e^-$$, the energy change corresponds to first ionization potential.It is the minimum amount of energy required to remove an electron from last orbit of an isolated (free) atom in the gaseous state.Chemistry

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