What are the causes for
Permanent hardness
Permanent hardness
95 questions across 4 question groups — pick any mix to generate a CHEMISTRY paper with step-by-step answer keys.
[1 Mark Question Answer]
50 Q→02[2 Mark Question Answer]
31 Q→03[3 Mark Question Answer]
10 Q→04[5 Mark Question Answer]
4 Q→One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
| Common Name | Chemical Name | Formula | Acid, base or salt | Efflorescent, hygroscopic or deliquescent substance |
| Solid caustic potash | ||||
| Quick lime | ||||
| Oil of vitriol | ||||
| Washing soda | ||||
| Solid caustic soda | ||||
| Blue vitriol |
Pick question groups from the list above, set marks and difficulty, and export a branded PDF with step-by-step answer keys. First 3 chapters free — no signup.