A man went door to door posing 2s a goldsmith he promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man had a hasty retreat. Canyou play the detective to find out the nature of the solution he had used ?

Explanation

The solution used was squa regia, a mixture of concentrated hydrochloric acid and nitric acid in the ratio 3:1. This mixture dissolves gold.