EXAMIANS
Infective bacteria in water is killed by the __________ process.
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CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.
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Which of the following is the most lethal water pollutant?
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Nitrogen oxides (NOx) is not produced in the __________ industry.
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Dose of chlorine for disinfection of water is about __________ mg/litre of water.
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In water chemical treatment plant, use of chloramines ensures
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Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre.
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The upper layer of atmosphere is called the
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Reingleman chart is used for the evaluation of __________ pollution.
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Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
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