JEE Advanced levelOne or more correct optionsDifficulty 3 of 3ig107
10mL of a gaseous compound CXxHXyNXz is burnt in excess oxygen in a eudiometer. Nitrogen is liberated as NX2. After cooling, the volume of COX2 formed is 20mL and the volume of NX2 is 5mL. The oxygen consumed is 37.5mL. Which statements are correct?
Ax=2
Bz=1
Cy=7
DThe compound could be ethylamine, CX2HX5NHX2
Answer: A, B, C, D
x=20/10=2 (A). NX2=5=10z/2, so z=1 (B). OX2 for CXxHXyNXz: x+y/4 per mole; 10(2+y/4)=37.5, y/4=1.75, y=7 (C). CX2HX7N is ethylamine (D). All correct.