An organic compound A contains 20 % C , 46.66 % ~N and 6.66 % H . It gives NH ₃ gas on heating with NaOH . A can be

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( aligned & C= 20 12 =1.66=1 & N= 46.66 14 =3.33=2 & H= 6.66 1 =6.66=4 & O= 26.68 16 =1.66=1 aligned ) Empirical formula of compound ( CN ₂ H ₄ O ) Since, this organic compound contains carbon, hydrogen, nitrogen and oxygen and on heating with alkali liberates ( NH ₃ ) the organic compound must be urea. ( NH ₂ CONH ₂+2 NaOH 2 NH ₃+ Na ₂ CO ₃ )