Urea is the main nitrogen containing substance in the …………..of mammals.
a) saliva
b) urine
c) blood
d) sweat
……………synthesized urea.
a) Ernest Solvay
b) Friedrich Wohler
c) Bronsted
d) none of these
In …………friedrich Wohler prepared urea.
a) 1926
b) 1927
c) 1928
d) 1929
Urea is synthesized from ……….substances.
a) inorganic
b) organic
c) both a & b
d) none of these
Urea
is one of the most important…fertilizers.
a) carbon
b) nitrogenous
c) sulphur
d) halogens
Nitrogen content available in a solid fertilizer is……………..
a) 46.67 %
b) 48.67 %
c) 40.65 %
d) 50%
