Question

15. A man went door to door posing as 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 beat a hasty retreat. Can you play the detective to find
out the nature of the solution he had used?​

Answer 1

Step-by-step explanation:

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. 

Answer By

Answer 2

Answer:

The name of the solution is Aquarasia. It is made up of 1 part of conc. HNO_{3}HHNO3

and 3 parts of conc. HCl. It is highly powerful and is also used to melt gold

may be it is one of the brilliant answer