Consider the following statements : (i) Zirconium - alizarins due is used for testing fluoride ions is water (ii) Ozone layer is present in mesosphere (iii) the poisonous gas present in the exhaust fumes of automobiles is Co (iv) Taj Mahal is affected by `CO_(2)` gas The correct statement areA. (i) and (iii)B. (i),(ii) ,(iii)C. (i),(iii) and (iv)D. all of these

Consider the following statements : (i) Zirconium - alizarins due is u

1.	Consider the following statements : (i) Zirconium - alizarins due is used for testing fluoride ions is water (ii) Ozone layer is present in mesosphere (iii) the poisonous gas present in the exhaust fumes of automobiles is Co (iv) Taj Mahal is affected by `CO_(2)` gas The correct statement areA. (i) and (iii)B. (i),(ii) ,(iii)C. (i),(iii) and (iv)D. all of these
Answer» Correct Answer - A

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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 pollutantsA. `CO_(2)`B. `SO_(2)`C. Both (a) and (b)D. None of these
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