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JEE Main · 2021 · 27 Jul 2021 · Shift 2 · Environmental Chemistry

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Match List - I with List - II:

List - I (compound)
(a) Carbon monoxide
(b) Sulphur dioxide
(c) Polychlorinated biphenyls
(d) Oxides of nitrogen

List - II (effect / affected species)
(i) Carcinogenic
(ii) Metabolized by pyrus plants
(iii) Haemoglobin
(iv) Stiffness of flower buds

Choose the correct answer from the options given below:

Answer: A → III, B → IV, C → I, D → II

Solution

Carbon monoxide binds to the iron of haemoglobin far more firmly than oxygen does, forming carboxyhaemoglobin and cutting the oxygen-carrying capacity of blood. Sulphur dioxide injures plant tissue and causes stiffness of flower buds, which then drop from the plant. Polychlorinated biphenyls resist degradation, accumulate in fatty tissue and are carcinogenic. Oxides of nitrogen are metabolised by pyrus plants. The pairing is carbon monoxide with haemoglobin, sulphur dioxide with stiffness of flower buds, polychlorinated biphenyls with carcinogenic, and oxides of nitrogen with metabolised by pyrus plants.

JEE Main · 2021 · 27 Jul 2021 · Shift 2 · Match the columns

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