Multiple choice

Which of the following is an incorrect match?

  1. Jeweller's borax: Na2B4O7.10H2O

  2. Fool's gold: FeS2

  3. Gymnastic’s chalk: MgCO3

  4. Photographer’s hypo: Na2S2O3.5H2O

  5. Baker's ammonia: (NH4)2CO3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Jeweller's borax (Na2B4O7. 5H2O) is the borax,  which contains five molecules of water of crystallisation.

Keep practicing — related questions