Question

A sample of water which starts lathering with soap solution on boiling is called temporary hard water.

• A. True
• B. False

Answer 1

The correct option is A True

A temporary hard water can from lather with soap. The ${Ca}^{2+}/{Mg}^{2+}$ ions of water displace ${Na}^{+}$ or $K^{+}$ ions from this salts & form insoluble $Ca/Mg$ salts of fatty acids.

$\because$ it is temporary hard water, lathering of soap is not that difficult.