Question 5
The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely the cause for lowering the pH of river water?

(a) Soap and detergent factory
(b) Lead battery manufacturing factory
(c) Plastic cup manufacturing factory
(d) Alcohol distillery

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Solution

Option (b) is correct.
Salts of lead compounds are acidic in nature. Hence, when they flow into the river they decrease the pH of the water. If the pH of the river decreases, the acidic nature of the water increases.

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Q. Question 5
The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely the cause for lowering the pH of river water?

(a) Soap and detergent factory
(b) Lead battery manufacturing factory
(c) Plastic cup manufacturing factory
(d) Alcohol distillery

Q. Question 5
The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely the cause for lowering the pH of river water?

(a) Soap and detergent factory
(b) Lead battery manufacturing factory
(c) Plastic cup manufacturing factory
(d) Alcohol distillery

Q. The pH of water sample collected from a river was found to be acidic in the range of

3.5 - 4.5

, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?

The pH of a sample of water collected from a river is found to be in the range of 3.5 to 4.5. The most likely reason for this is the waste being discharged into the river from a:
(a) soap and detergent manufacturing factory
(b) car battery manufacturing factory
(c) alcohol manufacturing factory
(d) plastic cups moulding factory

Q. Hot water discharge into rivers from factories is also a pollutant. True or false?

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Pollution in Ganga

Standard X Physics

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Option (b) is correct. Salts of lead compounds are acidic in nature. Hence, when they flow into the river they decrease the pH of the water. If the pH of the river decreases, the acidic nature of the water increases.

Option (b) is correct.
Salts of lead compounds are acidic in nature. Hence, when they flow into the river they decrease the pH of the water. If the pH of the river decreases, the acidic nature of the water increases.