Which of the following salt dissociates into metal oxide & ${S O}_{3} ({S O}_{2} + \frac{1}{2} O_{2})$ on heating?

K_{2} {S O}_{4}

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C a {S O}_{4}

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({N H}_{4})_{2} {S O}_{4}

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R b_{2} {S O}_{4}

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Solution

The correct option is B $({N H}_{4})_{2} {S O}_{4}$
We know sulphates and nitrates of group I and II metals do not give hydrogen on heating.
$(N H_{4})_{2} S O_{4} Δ - \to N H_{3} + S O_{2} + 1 / 2 O_{2}$

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K_{2} {C r}_{2} O_{7} + K I + H_{2} {S O}_{4} \to K_{2} {S O}_{4} + {C r}_{2} {({S O}_{4})}_{3} + I_{2} + H_{2} O

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K M {n O}_{4} + H_{2} C_{2} O_{4} + H_{2} {S O}_{4} \to K_{2} {S O}_{4} + {M n S O}_{4} + {C O}_{2} + H_{2} O

K_{2} {C r}_{2} O_{7} + {a H}_{2} {S O}_{4} + {b S O}_{2} \to K_{2} {S O}_{4} + {C r}_{2} {(S O}_{4})_{3} + {c H}_{2} O

K_{2} {S O}_{4} . {A l}_{2} {({S O}_{4})}_{3} .24 H_{2} O

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{C a S O}_{4}

{(N H}_{4})_{2} {S O}_{4}

{C a C l}_{2}

K C N, K_{2} {S O}_{4}, ({N H}_{4})_{2} C_{2} O_{4}, N a C l, Z n ({N O}_{3})_{2}, F e {C l}_{3}, K_{2} {C O}_{3}, {N H}_{4} {N O}_{3}, L i C N

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