In water filters, ___________ absorbs organic pollutants and eliminates unpleasant odors and tastes.

The correct answer is: Carbon

• Organic compounds are those which contain carbon 
• Carbon is used in preparing water filters
• The carbon is present in the form of granulated activated carbon in the filters
• The carbon is a good adsorbent which helps in purification by attracting the contaminants to its surface
• The carbon absorbs organic compounds like dye or phenolic compounds and also inorganic compounds like chlorine, halides, etc
• The carbon filters also remove unpleasant odor and taste from the sewage