The amount of coagulation needed for coagulation of water increases with

i) increase in turbidity of water

ii) decrease in turbidity of water

iii) increase in temperature of water

iv) decrease in temperature of water

- 1
  
  (i) and (ii)
- 2
  
  (i) and (iv)
- 3
  
  (ii) and (iii)
- 4
  
  (ii) and (iv)

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