When a green solid $P$ was heated, it turned into a black solid $Q$ and a colourless gas $X$ was given off. On passing gas $X$ overheated carbon, another colourless gas $Y$ was formed. Gas $Y$ burned in oxygen to reform gas $X$ .

Identify $P$ and $Q$ .

C u C O_{3}, C u O

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C u_{2} (C O_{3})_{3}, C u_{2} O

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C a C O_{3}, C u O

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C u O, C O_{2}

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Solution

The correct option is B $C u C O_{3}, C u O$
$C u C O_{3} △ \to C u O + C O_{2}$
$(P)$ $(Q)$ $(X)$
$↓$ $↓$
(green colour) (cupric oxide which is black in colour)

$3 C O_{2} + 3 C ⟶ 6 C O (Y)$

$2 C O + O_{2} ⟶ 2 C O_{2} (X)$

$(P)$ and $(Q)$ are $C u C O_{3}$ and $C u O$

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When a green solid P was heated, it turned into a black solid Q and a colourless gas X was given off. On passing gas X overheated carbon, another colourless gas Y was formed. Gas Y burned in oxygen to reform gas X.Identify P and Q.

The correct option is B CuCO3,CuOCuCO3△→CuO+CO2(P) (Q) (X) ↓ ↓ (green colour) (cupric oxide which is black in colour)3CO2+3C⟶6CO(Y)2CO+O2⟶2CO2(X) (P) and (Q) are CuCO3 and CuO

When a green solid $P$ was heated, it turned into a black solid $Q$ and a colourless gas $X$ was given off. On passing gas $X$ overheated carbon, another colourless gas $Y$ was formed. Gas $Y$ burned in oxygen to reform gas $X$ .

Identify $P$ and $Q$ .

The correct option is B $C u C O_{3}, C u O$
$C u C O_{3} △ \to C u O + C O_{2}$
$(P)$ $(Q)$ $(X)$
$↓$ $↓$
(green colour) (cupric oxide which is black in colour)

$3 C O_{2} + 3 C ⟶ 6 C O (Y)$

$2 C O + O_{2} ⟶ 2 C O_{2} (X)$

$(P)$ and $(Q)$ are $C u C O_{3}$ and $C u O$