Multiple choice

A lady took out her old gold jewellery to wear in a wedding. To give it a better shine, she gave it to a goldsmith, who put it into a solution and had it polished instantly. Which of the following was present in the solution?

  1. Magnesium sulphate

  2. Sulphuric acid

  3. Mercury

  4. Sodium hydroxide

  5. Nitric acid

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Nitric acid is used to polish jewellery.