The correct answer is option C – N2O3
According to the given statement, the equation will be -
10 ml of NxOy + 30 ml of H2 gives 10 ml of N2 + H2O
Assuming that 1 mol of the compound is used, the partially balanced equation will be 1NxOy + 3H2 gives 1N2 + H2O
By balancing the N, H, and O atoms on both the sides, we get the equation as – N2O3 + 3H2 ⟶ N2 + 3H2O
Therefore, the formula of the compound is N2O3.