Question - 2

Chlorine gas used for disinfection combines with water to form hypochlorous acid (HOCl). The hypochlorous acid ionises to form hypochlorite ion (OCl^-) in a reversible reaction.
\(HOCI\rightleftharpoons H^{ + }+OCI^{ - }\quad (K=2.7\times 10^{ -8 }\quad AT\quad 20^{ 0 }C\)
The equilibrium of which is governed by pH. The sum of HOCL and OCI^- is known as free chlorine residuals. The 90% fraction of HOCL in the chlorine residual is available at a pH value

Question - 3

The amount of bleaching powder containing 20% available chlorine needed to chlorinate a rural water supply covering a population of 10000 at 50L/cd at rate of ppm is

Question - 4

Polluated water is one, which

Question - 5

When the mode of measurement of turbidity is the adsorption of light the measuring apparatus is called a

Question - 6

One true colour unit is the colour produced by

Question - 7

The composition of a certain MSW sample and specific weights of its various compnents are given below 

Specific weight of MSW sample is 

Question - 8

50 g of CO₂ and 25 g of CH₄ are produced from decomposition of MSW with a formula weight of 120 g. What is averagge per capita green house gas production in a city of 1 million people? With MSW production rate 500 ton / day.

Question - 9

Which of the following materials are used as land fills sealants for the control of gas and leachate movements?
1.Lime
2.Sand
3.Bentonite
4.Fly ash
5.Butyl rubber
Select the correct answer using codes.

Question - 10

Which one of the following  method can be employed for plastic and rubber disposal?