JEE Main · 2019 · 11 Jan 2019 · Shift 2 · Environmental Chemistry

The higher concentration of which gas in air can cause stiffness of flower buds?

(A) $NO_{2}$
(B) $CO_{2}$
(C) $SO_{2}$ ✓ Correct
(D)CO

Answer: (C)

Solution

The pollutant responsible is sulphur dioxide,

SO X_{2}

. In raised concentrations it injures plant tissue, bringing on chlorosis and necrosis of the leaves and the stiffening and premature dropping of flower buds, so normal flowering is suppressed.

JEE Main · 2019 · 11 Jan 2019 · Shift 2 · Single correct option

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