NEET 2006 Biology question

The 'blue baby' syndrome results from-

(1)Excess of chloride
(2)MethemoglobinCorrect
(3)Excess of dissolved oxygen
(4)Excess of TDS (total dissolved solids)

Answer: (2)

Solution

Blue baby syndrome (methaemoglobinaemia) occurs when drinking water contains excess nitrate. Nitrate is reduced to nitrite in the infant's gut; nitrite oxidises the Fe2+ of haemoglobin to Fe3+, forming methaemoglobin, which

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Question ID VK-089640