By lime soda process, hardness can be reduced to less than

Related MCQs

• The lime soda process of water softening
• In lime soda process, the pH value of treated water is increased.
• The temporary hardness due to calcium bicarbonates can be removed by
• By base exchange method, water of zero degree hardness can be obtained.
• The permanent hardness of water can be removed by
• The layers such as lime stone and snd store which do not allow the water to pass through them are known as
• The temporary hardness in water is cused due to the salts like
• When manganese is present in water, it reduces the degree of hardness.
• The maximum permissible hardness in water for drinking purposes should not exceed 100 ppm.
• The presence of calcium and magnesium bi-carbonates in water causes hardness in the water.