Identify the incorrectly matched pair with respect to contamination of water
1. Minamata disease: Mercury
2. Blue baby syndrome: excessive nitrates
3. Black foot disease: excessive arsenic
4. Dental caries: excessive fluoride

Ecological sanitation, also known as ecosan, is a new paradigm in sanitation that
1. eliminates the use of conventional pesticides to decrease environmental insult
2. recognizes human excreta and household waste water as resources that can and are recovered, treated, and reused
3. emphasizes the disposal of solid wastes in sanitary landfill sites
4. emphasizes the need for strict legislation against polluting industries

Match each item in Column I with one item in Column II and choose the correct answer from the code given below:

Codes:
             A.            B.                   C.              D.
1.          a              b                    c               d

2.          b              a                    d               c

3.          d              c                    b               a

4.          c              d                    a               b

The "blue baby' syndrome results from

1. excess of chloride

2. methaemoglobin

3. excess of dissolved oxygen

4. excess of TDS (Total Dissolved Solids)

Chronic exposure to arsenic causes ?

1. blue-baby syndrome

2. foot and mouth disease

3. dropsy

4. itai-itai disease

Minamata disease was caused due to the consumption of

1. sea food containing lot of cadmium

2. fish contaminated with mercury

3. oysters with lot of pesticide

4. sea food contaminated with selenium.

Formation of non-functional methaemoglobin causes blue-baby syndrome. This is due to
(1) excess of arsenic concentration in drinking water

(2) excess of nitrates in drinking water

(3) deficiency of iron in food

(4) increased methane content in the atmosphere

Which one is matched correctly?
(1) Arsenic-Black foot disease

(2) Fluoride--Itai-itai

(3) Mercury-Skeletal fluorosis

(4) Cadmium-Minamata disease

To safeguard our water resources, Government of India has passed the

Integrated waste water treatment means