Q20 of 55 Page 113

Algal blooms impart a distinct colour to water due to:

Different pigments are responsible for different colours in algal blooms. Brown algae gets its colour from the xanthophylls pigment fucoxanthin, red algae get their colour from phycoerythrin, green is from chlorophyll.

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18

Which one of the following diseases is not caused due to contamination of water?

 19

Nuisance growth of aquatic plants and bloom-forming algae in natural waters is generally due to high concentrations of:

 21

Match the items in column I and column II and choose the correct option:

The correct match is:


 22

In the textbook you came across “Three Mile Island and Chernobyl disasters associated with accidental leakage of radioactive wastes.” In India we had Bhopal gas tragedy. It is associated with which of the following?