Question

Two statements are given below Statement--I: An object located at \(30\,\mathrm{km}\) above the sea level is in stratosphere. Statement--II: The maximum permissible limit of Cd present in drinking water is \(0.05\ \mathrm{ppm}\). The correct answer is

• A. Statements I, II both are correct
• B. Statements I and II both are not correct
• C. Statement I is correct but Statement II is not correct
• D. Statement I is not correct but Statement II is correct \bigskip

Hint:

Atmospheric layers: \begin{itemize} \item Troposphere: \(0-12\) km \item Stratosphere: \(12-50\) km \item Mesosphere: \(50-80\) km \end{itemize} The permissible limit of Cd in drinking water is about \(0.003\ \mathrm{ppm}\).

Answer 1

The Correct Option is C

Step 1: Stratosphere 12-50 km; 30 km falls within → Statement I correct. Cd limit in drinking water is 0.003 ppm, not 0.05 ppm → Statement II incorrect.

Step 2: Write the final answer. \(\boxed{\text{(C)}}\)