When I was roaming in Chennai after the Tsunami, I noticed poor sanitation and contaminated drinking water. This could be the main source of _______ in the nearby areas.

food for animals

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a large number of diseases

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good health

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antibiotics

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Solution

The correct option is B
a large number of diseases

Diseases spread most often in places with unsafe drinking water, poor sanitation and insufficient hygiene practices because these places have optimum conditions for growth of pathogenic bacteria.

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When I was roaming in Chandni Chowk in old Delhi, I noticed poor sanitation and contaminated drinking water. This could be the main source of ___ in the nearby areas.

Q. Which of the following could be a potential threat for the urban poor in the absence of proper sanitation facilities or clean drinking water?

A sample of drinking water was found to be severely contaminated with chloroform (CHCl₃). Supposed to be carcinogenic in nature. The level of contamination was 15 ppm (by mass).

(i) Express this in percentage by mass.

(ii) Determine the molality of chloroform in the water sample.

QUESTION 2.9(i)

A sample of drinking water was found to be severely contaminated with chloroform $(C H C l_{3})$ supposed to a carcinogen. The level of contamination was 15 ppm (by mass):

(i) Express this in per cent by mass.

(ii) Determine the molality of chloroform in the water sample.

A sample of drinking water was found to be severely contaminated with chloroform (CHCl₃) supposed to be a carcinogen. The level of contamination was 15 ppm (by mass):

(i) express this in percent by mass

(ii) determine the molality of chloroform in the water sample.

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When I was roaming in Chennai after the Tsunami, I noticed poor sanitation and contaminated drinking water. This could be the main source of _______ in the nearby areas.

The correct option is B a large number of diseases Diseases spread most often in places with unsafe drinking water, poor sanitation and insufficient hygiene practices because these places have optimum conditions for growth of pathogenic bacteria.

The correct option is B
a large number of diseases

Diseases spread most often in places with unsafe drinking water, poor sanitation and insufficient hygiene practices because these places have optimum conditions for growth of pathogenic bacteria.