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Oixalic acid on stragheating gives (A) a...

Oixalic acid on stragheating gives (A) and (B) which are gaseous prouct and ( C) which is a liwue . Gas (B) turns lime water miky. Gas (A) on reaction with chlorine gas gives (D) . (D)m as wll as (B) on heating with ammonia gas gives the same produce ( E) . Identify (A) ,(B), ( C), (D) and ( E).

Text Solution

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Oxalic acid `overset (Delta) (rarr) (A) _(g) + B_((g) + (C ) (I)`
Given ggas (A) byrns withwith blue flame , hence , it must be carbon monoxide (CO).
Gas (A) ggers oxidised to `CO_2` . Hence (B) is carbon dioxide .

gas (B) turns lime-water milky due to the formation of calcium carbonate .
`CO_2 + underset ("Lime water") (Ca(OH))_2rarr underset ("Mmilkiness") underset ("Calcium carbonate")(CaCO_3 darr+H_2O)`
Gas (A) on reaction with `Cl_2` goves `COOCl_2`, phosgene (D)
`CO + Cl_(2(g)) rarr underset ("Phosgene (D)") (COCl_2)`
Phosgene on heating with annonia gives
`underset ((D)) (COCl_2) + 2JH_3 rarr underset (Urea (E)) (H_2 NCONH_2 +2HCl)`
Carbon dioxide on hating with ammonia gives
`underset ((B)) (CO_2) + NH_3 rarr underset((E)) (H_2NCNH_2)`
Hence (A) is `CO`
(B) is `CO_2`
`(C) is H_2O`
(D) is `COCl_2`
(E) is `H_2 NCONHH_2` .
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