NDA General Science Chemistry Questions Part 1

4NH3+5O2→4NO+6H2O
4 mol  5 mol
1‌mol‌

5

4

=1.25‌molSince, for 1 mol of NH3, 1.25 mol of O2 are required, therefore, O2 is the limiting factor (here O2 is only 1 mol). Hence, all O2 will be consumed in reaching with 1 mol of NH3.