MolSynapsequestion bank

MolSynapse / Question bank / Environmental Chemistry / Air pollution: gaseous pollutants, acid rain, smog

JEE Main levelSingle correct optionDifficulty 2 of 3ev018

Rain water of pH 4.4 is compared with normal rain of pH 5.6. Using $1 0^{1.2} = 15.8$ , the hydrogen ion concentration of the polluted rain is about

A16 times that of normal rain
B100 times that of normal rain
C12 times that of normal rain
D1.2 times that of normal rain

Answer: A

[H X^{+}]

is

1 0^{- pH}

, so the ratio is

1 0^{5.6 - 4.4} = 1 0^{1.2} \approx 15.8

. This is about 16 times, not 1.2 times (a common error of subtracting pH values directly).

Practice Environmental Chemistry More on Air pollution: gaseous pollutants, acid rain, smog

Previous questionNext question

More questions on Air pollution: gaseous pollutants, acid rain, smog