1.

underset"(Oxalic acid)"(H_2C_2O_4) oversetDeltato gas (A)+ gas (B) + liquid (C) Gas (A) burns with a blue flame and is oxidised to gas (B).Gas (B) turns lime water milky . Gas (A) + Cl_2 to (D) overset(NH_3 , Delta)to (E) A,B,C,D,E are respectively

Answer»

`CO_2 , CO, H_2O , HCOONH_2 , COCl_2`
`CO, CO_2 , COCl_2 , H_2O , HCOONH_2`
`CO, CO_2 , H_2O , COCl_2 , NH_2 CONH_2`
`CO,CO_2 , H_2O , NH_2CONH_2 , COCl_2`

SOLUTION :`H_2C_2O_4 oversetDeltato underset"(A)"(CO)+underset"(B)"(CO_2)+ underset"(C)"(H_2O)`
`underset"(B)"(CO_2)+underset"Lime WATER"(CA(OH)_2) to underset"MILKINESS"(CaCO_3)+H_2O`
`underset"(A)"(CO)+Cl_2 to underset"(D)"(COCl_2) underset"-2HCl"overset(2NH_3//Delta)to underset"(E)"(NH_2CONH_2)`


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