A metal nitrate A on heating gives yellowish brown coloured metal oxide with brown gas B and a colourless gas C. aqueous solution of A on reaction with potassium iodide forms a yellow precipitate of compound D. Identify A, B, C, D. Also identify the types of both the reactions.

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Solution

(Metal Nitrate) $- \to △$ (Metal Oxide) + Brown gas + Colorless gas
A yellowish brown B C
$↓$ $+ K I$
Yellow ppt. (D)
A $⟶ P b N O_{3}$ ; B $⟶ N O_{2}$ ; C $⟶ O_{2}$ ; D $⟶ P b I + K N O_{3}$
$P b N O_{3} - \to △ P b O + N O_{2} + O_{2}$ {Thermal Decomposition}
A B C
$P b N O_{3} + K I \to P b I + K N O_{3}$ {Double Decomposition reaction}
A D

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A metal nitrate A on heating gives yellowish brown coloured metal oxide with brown gas B and a colourless gas C. aqueous solution of A on reaction with potassium iodide forms a yellow precipitate of compound D. Identify A, B, C, D. Also identify the types of both the reactions.

(Metal Nitrate) −→△ (Metal Oxide) + Brown gas + Colorless gas A yellowish brown B C ↓ +KIYellow ppt. (D)A⟶PbNO3 ; B⟶NO2; C⟶O2; D⟶PbI+KNO3PbNO3−→△PbO+NO2+O2 {Thermal Decomposition} A B CPbNO3+KI→PbI+KNO3 {Double Decomposition reaction} A D