Bleaching (Simple tenses of verbs)


Grammar — Beginner Level
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Complete each sentence choosing the correct option

  1. In the 17th century, a cloth bleaching industry in Western Europe   alternating alkaline baths and acid baths.

  2. A Swedish chemist, Carl Wilhelm Scheele,   chlorine in 1774.

  3. Bleach often   specifically to a dilute solution of sodium hypochlorite.

  4. Bleaches   by reacting with many colored organic compounds.

  5. Bleaches   more useful in the years to come.


Practice your writing skills by discussing the questions below

  1. What are bleaches for?

  2. How often do use bleach ? Why?


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      • typically, a corrosive or sour-tasting liquid of this kind
      • having the properties of an alkali, or containing alkali; having a pH greater than 7
      • do or perform in turn repeatedly
      • an act or process of immersing and washing one's body in a large container of water
      • the chemical element of atomic number 17, a toxic, irritant, pale green gas
      • substance formed from two or more elements; mixture
      • (diluted )make (a liquid) thinner or weaker by adding water or another solvent to it
      • economic activity concerned with the processing of raw materials and manufacture of goods in factories
      • natural, biological
      • a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent)


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