A sample of air turns lime water milky and also turns acidified potassium dichromate green in aqueous solution has low p H. This is due to the presence of pollutants.

Question

A sample of air turns lime water milky and also turns acidified potassium dichromate green in aqueous solution has low p H. This is due to the presence of pollutants. (A) CO 2 (B) SO 2 (C) Both (a) and (b) (D) None of these

Tardigrade Admin · Accepted Answer

SO 2 turns lime water milky. SO 2 in aqueous solution gives H 2 SO 3. H 2 SO 3 leftharpoons H ++ HSO 3- CO 2 also turns lime water milky. CO 2 in aqueous solution gives H 2 CO 3. H 2 CO 3 leftharpoons H ++ HCO 3- H 2 SO 3 is stronger acid than H 2 CO 3. Thus, ionisation of H 2 SO 3 is larger than H 2 CO 3. Thus, p H of H 2 SO 3 is lower than that of H 2 SO 2.

Q. A sample of air turns lime water milky and also turns acidified potassium dichromate green in aqueous solution has low $p H$ . This is due to the presence of pollutants.

$C O_{2}$

$S O_{2}$

Both (a) and (b)

None of these

Q. A sample of air turns lime water milky and also turns acidified potassium dichromate green in aqueous solution has low pH. This is due to the presence of pollutants.

CO2​

SO2​

Both (a) and (b)

None of these

Q. A sample of air turns lime water milky and also turns acidified potassium dichromate green in aqueous solution has low $p H$ . This is due to the presence of pollutants.

$C O_{2}$

$S O_{2}$