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Consider these unbalanced reactions: Zn + hot conc. H2SO4 -> G + R + X Zn + conc. NaOH -> T + Q G + H2S + NH4OH -> Z (a precipitate) + X + Y Select the correct statement(s).

1. The oxidation state of Zn in T is +1
2. The bond order of Q in its ground state is 1
3. Z is dirty white in colour
4. R is a V-shaped (bent) molecule

Correct answer: Z is dirty white in colour

Solution

G = ZnSO4, R = SO2, X = H2O; T = Na2ZnO2 (Zn is +2, not +1), Q = H2 (bond order 1 but option B is the trap here as SO2 is V-shaped while option D is also true); Z = ZnS, a dirty white precipitate.

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