General Chemistry

The reactions match as follows based on the well-known organic transformations:

• A: undergoes Beckmann rearrangement.
• B: undergoes Baeyer-Villiger oxidation.
• C: undergoes Knoevenagel condensation.
• D: undergoes the Claisen-Schmidt reaction.

Step 1: Use of Nitrogen Compounds in Airbags.
Airbags in vehicles are inflated using nitrogen gas, which is generated by the decomposition of sodium azide (NaN ) in older systems. However, newer systems use lithium nitride (Li N) for safer and more efficient gas generation. Upon decomposition, lithium nitride produces nitrogen gas (N ), which inflates the airbags instantly.

Step 2: Analyzing the Options.
- (1) Li N is the correct choice, as it is used in modern airbags for nitrogen generation. - (2) Na N is not used in airbags. - (3) Ca N is not commonly used for airbags. - (4) Pb(N ) is not used in airbags.

Step 3: Conclusion.
The correct compound used in airbag inflation is Li N, which corresponds to option (1).