For per gram of reactant, the maximum quantity of N₂ gas is produced in which of the following thermal decomposition reactions? [Given: Atomic wt. Cr = 52u, Ba = 137u ].
a. Ba(N₃)₂(s)- Ba(C) + 3N₂(g)
b. (NH₄)₂Cr₂O₇(s)- N₂(g) + 4H₂O(g) + Cr₂O₃(s)
c. 2NH₃(g)- N₂(g) + 3H₂(g)
d. 2NH₄NO₃(s)- 2N₂(g) + 4H₂O(g) + O₂(g)
