Q. A colourless organic compound gives brisk effervescences with a mixture of sodium nitrite and dil. HCl. It could be
A) Oxalic acid
B) Acetic acid
C) Urea
D) Glucose
Explanation
(c)
$NaNO_{2} + HCl \rightarrow HNO_{2} + NaCL$
$H_{2}NCONH_{2} + HNO_{2} \rightarrow CO_{2} + NH_{3} + H_{2}O + N_{2}$
urea
$CO_{2}$ gas evolves with brisk effervescence
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.