Q4 of 37 Page 111

The main cause for abundant coliform bacteria in the river Ganga is

The main reason of originating of coliform bacteria is from the human excrete or waste of human. It is possible that human excreta is present in unburnt corpse, which when disposed into water of river Ganga, there is abundancy of Coliform bacteria.

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2

The most rapidly dwindling natural resource in the world is

 3

The most appropriate definition of a natural resource is that it is a substance/commodity that is

 5

The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5. On the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?

 6

The pH range most conducive for life of fresh water plants and animals is