Question

An organic compound contains C = 40%, H = 6.67%, N = 46.67% and rest is oxygen. On heating, it gives NH3 along with solid residue and solid residue gives violet colour with alkaline copper sulphate solution. If molecular mass of this organic compound is 60 g, then the compound is:

• (A) CH3NCO
• (B) CH4CH2CONH2
• (C) NH2CONH2
• (D) CH3CONH2

Answer 1

The Correct Option is C

Explanation:
According to the question:Organic compound $\triangleq$ Solid residue $+{\mathrm{NH}}_{3}T$Solid residue $+{\mathrm{CuSO}}_4\stackrel{O{H}^{-}}{⟶}$ Violet colourThus, the given compound is urea, having molecular formula ${\mathrm{NH}}_2{\mathrm{CONH}}_2$