You visited us 1 times! Enjoying our articles? Unlock Full Access!

Covalent Bond vs Ionic Bond

Which of the ...

Question

Which of the following reaction(s) is/are exothermic for the formation of $N a F (s)$ ?
I. $N a_{(g)} \to N a_{(g)}^{+} + e^{-}$
II. $F_{(g)} + e^{-} \to F_{(g)}^{-}$
III. $N a_{(g)}^{+} + F_{(g)}^{-} \to N a F_{(s)}$

I only

No worries! We‘ve got your back. Try BYJU‘S free classes today!

II only

No worries! We‘ve got your back. Try BYJU‘S free classes today!

I and III only

No worries! We‘ve got your back. Try BYJU‘S free classes today!

II and III only

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D II and III only
Case I
$N a$ is ionised to $N a^{+}$ and energy is required in the ionisation process, i.e., it is an endothermic process.

Case II
Due to high electron affinity, $F$ atom gains an electron and thus energy is released, i.e., it is an exothermic reaction.

Case III
This is the case of bond formation during which energy is released, i.e., exothermic reaction.

Suggest Corrections

Similar questions

N a F (s)

N a_{(g)} \to N a_{(g)}^{+} + e^{-}

F_{(g)} + e^{-} \to F_{(g)}^{-}

N a_{(g)}^{+} + F_{(g)}^{-} \to N a F_{(s)}

N a F (s)

N a_{(g)} \to N a_{(g)}^{+} + e^{-}

F_{(g)} + e^{-} \to F_{(g)}^{-}

N a_{(g)}^{+} + F_{(g)}^{-} \to N a F_{(s)}

N a F (s)

N a_{(g)} \to N a_{(g)}^{+} + e^{-}

F_{(g)} + e^{-} \to F_{(g)}^{-}

N a_{(g)}^{+} + F_{(g)}^{-} \to N a F_{(s)}

N a (s) \frac{1}{2} {C I}_{2} ⟶ N a C I (s) Δ H = Q

N a (s) ⟶ N a (g) Δ H = S

N a (g) ⟶ {N a}^{+} (g) + e^{-} Δ H = I

\frac{1}{2} {C I}_{2} (g) ⟶ C I (g) Δ H = \frac{D}{2}

C I (g) + e^{-} ⟶ C I^{-} (g) Δ H = ?

{N a}^{+} (g) + {C I}^{-} (g) ⟶ N a C I (s) Δ H = - U

N a (s) S - ------------ \to Energy of subtimation N a (g)

N a (g) I - ---------- \to Ionisation potenital N a^{+} (g) + e^{-}

C l_{2} (g) D - -------------- \to Bond dissociation energy 2 C l (g)

C l (g) + e^{-} E - --------- \to Electron - affinity C l^{-} (g)

C l^{-} (g) + N a^{+} (g) U - ------- \to Lattice energy N a C l (s)

Join BYJU'S Learning Program