UPSC CDS 2 2021 GK Paper

Statement 2 and 3 are correct. Alkali is a base.It is a base that dissolves in water which is very important to remember.Not all bases are alkali but all alkali is base.Bases that dissolve in water are alkali.Alkalis are soapy to touch as they react with oils of our skin to form soaps.Compounds that have an alkaline pH, such as baking soda, often have a bitter flavor. Alkalis are very corrosive in nature and penetrate deeply.