Chapter U4, Problem 17STP

Interpretation Introduction

Interpretation:

The correct description of the given reaction needs to be identified.

Concept introduction:

A chemical equation is a symbolic depiction of a chemical reaction in the form of formulae and symbols, wherein the reactant units are given on the left side and the product units on the right side.

Answer to Problem 17STP

The correct option is (C).

Explanation of Solution

Reason for correct option:

The given reaction is:

${\text{N}}_{\text{2}}{\text{(g)+3H}}_{\text{2}}\text{(g)}\to {\text{2NH}}_{\text{3}}\text{(g)}$

Here, the ratio of number of moles of N2 and H2 is 1:3 and it results in the formation of 2 mol of ammonia thus, it is correct that 2 mol of ammonia is produced when H₂ is present 3 times as number of moles of N₂.

So, the correct option is (C).

Conclusion

Reason for incorrect option/s:

The given reaction is:

${\text{N}}_{\text{2}}{\text{(g)+3H}}_{\text{2}}\text{(g)}\to {\text{2NH}}_{\text{3}}\text{(g)}$

The above reaction is balanced thus, option (a) is incorrect.

In the given reaction 3 moles of H₂ reacts with 1 mole of N₂ to produce 2 moles of NH₃.

If more molecules of N₂ are added in reactant side the number of N atom will be greater than 2, in this situation the reaction is not balanced. Thus, option (b) is incorrect.

If 6 mol of H₂ and 2 mol of N₂ are used, then 4 mol of NH₃ will be produced. Thus, option (d) is incorrect.