H_2C_2O_4 xrightarrow{Delta} text{gas } (A) + | vedclass

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(D) The thermal decomposition of oxalic acid $(H_2C_2O_4)$ is given by:$H_2C_2O_4 \xrightarrow{\Delta} CO (A) + CO_2 (B) + H_2O (C)$Gas $(A)$ is $CO$,

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$CO, CO_2, COCl_2$

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(D) The thermal decomposition of oxalic acid $(H_2C_2O_4)$ is given by:$H_2C_2O_4 \xrightarrow{\Delta} CO (A) + CO_2 (B) + H_2O (C)$Gas $(A)$ is $CO$,which burns with a blue flame and is oxidized to $CO_2$ (gas $B$).Gas $(A)$ reacts with $Cl_2$ in the presence of sunlight or charcoal to form phosgene $(COCl_2)$:$CO + Cl_2 	o COCl_2 (D)$Thus,$A = CO$,$B = CO_2$,and $D = COCl_2$.

$H_2C_2O_4 \xrightarrow{\Delta} \text{gas } (A) + \text{gas } (B) + \text{liquid } (C)$.
Gas $(A)$ burns with a blue flame and is oxidised to gas $(B)$.
Gas $(A) + Cl_2 \to (D)$.
$A, B$ and $D$ are:

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$H_2C_2O_4 \xrightarrow{\Delta} \text{gas } (A) + \text{gas } (B) + \text{liquid } (C)$.Gas $(A)$ burns with a blue flame and is oxidised to gas $(B)$.Gas $(A) + Cl_2 \to (D)$.$A, B$ and $D$ are: