Xg-e- X-g-E Here- E is -

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Standard XII

Chemistry

Conductivity MP BP and Electronegativity (Group 2)

Xg+e-→ X-g+E ...

Question

$X_{(g)} + e^{-} \to X_{(g)}^{-} + E$
Here, $E$ is :

first electron affinity

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first ionisation energy

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second electron affinity

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second ionisation energy

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Solution

The correct option is B first electron affinity
The first electron affinity is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion.
In the above reaction, $X$ is gaining one electron to form uninegative ion, hence, $E$ is first electron affinity of the atom.

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Similar questions

Q. N

_{0}

/2 atoms of X(g) are converted into X

^{+}

(g) by energy E

_{1}

. N

_{0}

/2 atoms of X(g) are converted into X

^{-}

(g) by energy E

_{2}

. Hence, ionisation potential and electron affinity of X(g) are:

\frac{N_{0}}{2}

atoms of

X (g)

are converted into

X^{+} (g)

by absorbing

E_{1}

energy.

2 N_{0}

atoms of

X (g)

are converted into

X^{-} (g)

by releasing

E_{2}

energy. Calculate the ionisation enthalpy and electron gain enthalpy of

X (g)

per atom.

A_{0} / 2

atoms of

X (g)

are converted into

X^{+} (g)

by absorbing energy

E_{1}

A_{0} / 2

X^{+} (g)

are converted into

X^{-} (g)

with the release of energy,

E_{2}

. Hence the ionisation energy and the electron affinity of

X (g)

are repectively _____ and _______.

N_o/2 atoms of X(g) are converted into X⁺(g) by energy E₁. N_o/2 atoms of X(g) are converted into X^-(g) by energy E₂. Hence the ionisation potential and electron affinity of X(g) per atom are:

A. 2E₁/N_o., 2(E₂-E₁)/N_o

B. 2E₁/N_o.,. 2E₂/N_o

C. E₁-E₂/N_{o. ,.}2E₂/N_o

D. None is correct

Q. Ionisation energy for hydrogen atom in the ground state is E. What is the ionisation energy of

L i^{+ +}

atom in the

2^{n d}

excited state

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X(g)+e−→X−(g)+E Here, E is :

$X_{(g)} + e^{-} \to X_{(g)}^{-} + E$
Here, $E$ is :