An aqueous solution of ammonia relieved the student's pain by inducing an endothermic reaction, leading to a cold compress that reduced swelling.
The student was relieved of pain after being stung by a nettle plant because the teacher applied an aqueous solution of ammonia. The ammonia solution is important for providing relief by causing an endothermic reaction that absorbs heat from the surroundings, creating a cold compress that reduces swelling and pain.
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