Environmental Engineering in CE
The amount of coagulant 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 waterThe correct answer is

(ii) and (iv)
(i)and(iv)
(ii) and (iii)
(i) and (ii)

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Environmental Engineering in CE
Higher concentration of CO₂ in atmosphere

All of these
Allows visible solar radiation (ultraviolet) of short wave-length to pass through
Prevents solar heat being radiated out completely, resulting in
Reflects and absorbs the longer wavelength (infra-red) radiations

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