Alkalis are bases that can neutralize acids to form salts and water.Alkalis are groups of chemicals with high pH. Alkalis can help soften potable water and remove impurities such as manganese, fluorides and organic tannins. According to the National Lime Association, heavy industries use alkali in the form of lime to absorb and neutralize sulphur oxides to aid in reducing acid rain.Lime is a manufactured product made from limestone (calcium carbonate) or dolomite (calcium magnesium carbonate). The raw material is processed into quicklime and hydrated lime. Since it is alkaline, it's often used to adjust the pH of water and soils containing acidic components. It's used to treat both drinking water and wastewater.There has been a lot of hype about the health benefits of drinking alkaline water, but those on the other side of the fence believe that that is all it is—hype. What makes alkaline water so special from the regular variety  Q 2.1A farmer adds lime to the soil before growing a crop. Outline the uses of calcium carbonate.

Calcium carbonate, also known as lime, has several uses in agriculture:

1. Soil pH Adjustment: Lime is used to adjust the pH of the soil. Most crops grow best in neutral to slightly acidic soils. By adding lime, a farmer can raise the pH of acidic soils, making it more suitable for crop growth.

2. Nutrient Availability: Lime can improve the availability of essential nutrients for plant growth. Certain nutrients, such as phosphorus, are more available to plants in slightly alkaline conditions.

3. Pest Control: Lime can also be used as a form of pest control. Certain pests and diseases are less prevalent in soils with a higher pH.

4. Improving Soil Structure: Lime can help to improve the physical properties of the soil, making it easier to work with and improving its ability to hold water and nutrients.

5. Neutralizing Harmful Elements: Lime can help to neutralize potentially harmful elements in the soil, such as aluminum and manganese, which can become toxic to plants in acidic conditions.

6. Source of Calcium: Lime is a source of calcium, an essential nutrient for plant growth. Calcium is important for cell wall structure and is also involved in various metabolic processes in the plant.