Question

sohan went dpor to door posing as a goldsmith he promised to bring back the glitter of old ans dull gold ornaments​

Answer 1

Answer:

it is aqua regia

Explanation:

it is a cocentration of HCl and HNO3 in the ratio of 3:1 .The wieght of bangles reduced because some of its part was desolved in the solution

and it is a strong oxidising agent

Answer 2

1. Sohan went door to door posing as a goldsmith he promised to bring back the glitter of old and dull gold ornaments.

2. He could do this using aqua regia.

3. Aqua regia is corrosiverand is used to clean glassware and also in gold refining processes.

3. The composition of it is nitric acid and hydrochloric acid in a 1:3 ratio.

4. The name aqua regia comes from the Latin words 'royal water', as it can dissolve gold and platinum - which are medals known to be royal.