Question

When the bottle of soft drink is opened, what would take place from the following?
(A) Solubility of dissolved gas decreases.
(B) bottle released internal pressure.
(C) effervences evolved from the bottle.
(D) increase in external pressure.
Identify the correct choice.

• A. (A), (B) and (C) only.
• B. (A), (B) and (D) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

Henry law: opening the bottle drops the pressure above the liquid, and the gas leaves the solution.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
A soft drink is made by dissolving \(\text{CO}_2\) in water under high pressure. By Henry's law the solubility of a gas rises with its pressure.

Step 2: Check statement (A)
When the cap is opened, the pressure above the liquid falls to atmospheric. So the solubility of the dissolved gas decreases. True.

Step 3: Check statement (B)
The gas trapped above the liquid rushes out, so the internal pressure is released. True.

Step 4: Check statement (C)
Because the gas is no longer soluble at the lower pressure, it comes out as bubbles. This is effervescence. True.

Step 5: Check statement (D)
Opening the cap does not change the outside atmospheric pressure. It is the internal pressure that falls. So (D) does not happen.

Step 6: Conclusion
The correct choice is (A), (B) and (C) only, option (A).

Final Answer:
Statements (A), (B) and (C) occur, while (D) does not, so the answer is option (A). \[ \boxed{\text{(A), (B) and (C) only}} \]