WAEC - Chemistry (2001 - No. 31)
Which of the following constitutes an advantage in the use of hard water?
Formation of scum with soap
Furring of kettles
Blockage of water pipes
Formation of strong bones
Explication
Drinking hard water can help strengthen bones because it contains calcium, an essential mineral for bone health. Your body absorbs calcium from hard water the same way it does from other food sources.