Question

Given below are two statements:
Statement I: Bergeron process is related to cold clouds.
Statement II: Silver iodide is associated with cloud seeding trials.
In light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement I and Statement II are correct
• B. Both Statement I and Statement II are incorrect
• C. Statement I is correct but Statement II is incorrect
• D. Statement I is incorrect but Statement II is correct

Hint:

Remember: Bergeron process = Cold clouds (ice crystal theory).
Warm clouds = Collision-coalescence process.
Dry ice and Silver Iodide (\(\text{AgI}\)) are the primary chemical agents used for seeding cold clouds.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Precipitation formation in clouds occurs through different mechanisms depending on cloud temperature.
Cloud seeding is an artificial weather modification technique used to induce or enhance precipitation from clouds.

Step 2: Detailed Explanation:
Statement I: The Bergeron-Findeisen process (or cold rain process) describes precipitation formation in "cold clouds" (clouds with temperatures below \(0^\circ\text{C}\)).
In these mixed-phase clouds, ice crystals grow rapidly at the expense of supercooled water droplets due to differences in saturation vapor pressure over water and ice.
Hence, Statement I is correct.
Statement II: Silver iodide (\(\text{AgI}\)) has a crystalline structure highly similar to natural ice crystals.
It serves as an effective artificial ice-nucleating agent in glaciogenic cloud seeding of cold clouds to induce precipitation.
Hence, Statement II is correct.

Step 3: Final Answer:
Since both Statement I and Statement II are correct, the appropriate option is (A).