a gentleman who was fashionably dressed was strolling along with a gold-headed cane in his hand when he was hailed by a miserable looking lame man apparently in needy circumstances. The gentleman's compassion was aroused and he gave him a shilling. Another man standing near, there upon came up and said, "How can you be so foolish? Don't you know that fellow is not a cripple at all? He is sheer cheat; just lend me that stick of yours till I beat him for his roguery." The gentleman, not thinking anything was wrong, acceded to request. The beggar having heard what was said, promptly dropped his crutches and botled like a trained athelete. The other man rushed after him in hot pursuit shouting that he would give him his due desert when he caught him. Both disappeared round a corner.
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The man had used the solution of aqua-regia is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange fuming liquid. Aqua regia was so named because it can dissolve the noble metals gold and platinum. After dipping the gold ornaments in it the outer layer of gold gets dissolved and the inner shiny layer appears.
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