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.

2 & 3

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3 &4

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Solution

The correct option is B
2

Diseases spread most often in places with unsafe drinking water, poor sanitation and insufficient hygiene practices. This happens because these places have optimum conditions for growth of bacteria that spread around in the population.

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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):

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

The correct option is B 2Diseases spread most often in places with unsafe drinking water, poor sanitation and insufficient hygiene practices. This happens because these places have optimum conditions for growth of bacteria that spread around in the population.

The correct option is B
2

Diseases spread most often in places with unsafe drinking water, poor sanitation and insufficient hygiene practices. This happens because these places have optimum conditions for growth of bacteria that spread around in the population.