Select the equations that have an exothermic step-I- S-g- S2- gII- Na-g - Cl-g- NaClsIII- Ng- N- gIV- Al2-g- Al3- gChoose the correct code-

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Select the eq...

Question

Select the equations that have an exothermic step.
$I . S_{(g)}^{-} \to S_{(g)}^{2 -}$
$I I . N a_{(g)}^{+} + C l_{(g)}^{-} \to N a C l_{(s)}$
$I I I . N_{(g)} \to N_{(g)}^{-}$
$I V . A l_{(g)}^{2 +} \to A l_{(g)}^{3 +}$
Choose the correct code:

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I, II

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III and IV

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II and III

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S_{(g)}^{-} \to S_{(g)}^{2 -}

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

N_{(g)} \to N_{(g)}^{-}

A l_{(g)}^{2 +} \to A l_{(g)}^{3 +}

I . S_{(g)}^{-} \to S_{(g)}^{2 -}

I I . N a_{(g)}^{+} + C l_{(g)}^{-} \to N a C l_{(s)}

I I I . N_{(g)} \to N_{(g)}^{-}

I V . A l_{(g)}^{2 +} \to A l_{(g)}^{3 +}

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)}

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