Q. H₂S gas is _______ to generate sulphuric acid.

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Q. Hydrogen sulphide is formed under ______ conditions.

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Q. What is the flow velocity condition required for the formation of hydrogen sulphide?

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Q. What is the temperature condition required for hydrogen sulphide formation?

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Q. The rate of release of H₂S is high at the points of ______

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Q. What is the exposure limit of H₂S in a day?

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Q. What is the limit of H₂S exposure for 30 minutes?

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Q. What is the odour threshold limit of H₂S gas?

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Q. What amount of H₂S causes increased eye problems?

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Q. What is the chemical used to prevent H₂S gas formation from Magnesium hydroxide?

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Q. What is the chemical used to prevent H₂S gas formation from Sodium hydroxide?

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Q. What is the chemical used to prevent H₂S gas formation from Ferric chloride?

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Q. Storm water can even occur as snow melts.

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Q. Which of the following is not a negative effect of storm water?

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Q. Pollutants entering surface waters during precipitation events is termed ________

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Q. Water is recycled into the atmosphere by vegetation through the process called ______

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Q. Stream erosion can be caused by excess ______

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Q. Storm water is a major cause of urban flooding.

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Q. Which of these is a single event?

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Q. What is the amount spent in the UK every year because of flooding?

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