Question

Select the incorrect statement from the following option.

b) Hard water contains dissolved calcium and magnesium salts in it
c) In hard water, cleansing quality of soap is depressed
d) Due to the presence of dissolved hardness-producing salts, the boiling point of water is depressed
a) Water which does not form lather with soap and forms white scum is called hard water​

Answer 1

The correct option is d.

• Calcium(Ca) and magnesium(Mg) salts are dissolved in water and cause hardness in water.
• In hard water, the cleansing quality of soap decreases.
• Due to the presence of dissolved hardness-producing salts, the boiling point of water is elevated because it is a colligative property.
• Hard water does not form lather easily with soap and forms white scum.
• Thus the incorrect statement is d.

Answer 2

Answer:

d

Due to the presence of dissolved hardness-producing salts, the boiling point of water is Elevated.