Consider the following reactions (unbalanced) Zn + hot conc. H 2 SO 4 longrightarrow G + R + X Zn + conc. NaOH longrightarrow T + Q G + H 2 S + NH 4 OH longrightarrow Z (a precipitate) + X + Y Choose the correct option(s)

Bond order of Q is 1 in its ground state

The oxidation state of Zn in T is +1

Chemistry · d and f Block Elements

JEE Advanced 2019 — Paper 2 — Question 15

Consider the following reactions (unbalanced)

\text{Zn} + \text{hot conc. } \text{H}_2\text{SO}_4 \longrightarrow \text{G} + \text{R} + \text{X}

\text{Zn} + \text{conc. NaOH} \longrightarrow \text{T} + \text{Q}

\text{G} + \text{H}_2\text{S} + \text{NH}_4\text{OH} \longrightarrow \text{Z (a precipitate)} + \text{X} + \text{Y}

Choose the correct option(s)

\mathrm{Zn} + \underset{\text{hot, conc.}}{\mathrm{H_2SO_4}} \longrightarrow \underset{(G)}{\mathrm{ZnSO_4}} + \underset{(R)}{\mathrm{SO_2}} + \underset{(X)}{\mathrm{H_2O}}

\text{Zn} + \text{conc. NaOH} \longrightarrow \underset{\text{(T)}}{\text{Na}_2\text{ZnO}_2} + \underset{\text{(Q)}}{\text{H}_2}

\underset{\text{(G)}}{\text{ZnSO}_4} + \text{H}_2\text{S} + 2\text{NH}_4\text{OH(aq.)} \longrightarrow \underset{\text{(Z)}}{\text{ZnS} \downarrow} + \underset{\text{(Y)}}{(\text{NH}_4)_2\text{SO}_4} + 2\underset{\text{(X)}}{\text{H}_2\text{O}}

Answer key and solution verified before publishing.

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