Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science

At STP, 1 ppb sulphur dioxide is equivalent to :

1
∼ 7.31 μg m-3
2
∼ 3.16 μg m-3
3
∼ 4.52 μg m-3
4
∼ 2.86 μg m-3
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