Question

Consider the following statements :
(i) Zirconium-Alizarins dye is used for testing fluoride ions in 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 $C{O}_2$ gas
The correct statements are ?

• A. (i) and (iii)
• B. (i), (ii), (iii)
• C. (i), (iii) and (iv)
• D. all of these

Answer 1

The correct option is A (i) and (iii)

The second and fourth statement is incorrect because,

The Ozone layer is present in the lower portion of the stratosphere. Also, the taj mahal is affected by the presence of oxygen, chlorine, sulphur dioxide, and hydrogen.