Question

Chloroquine contains chlorine at _______

• A. \(2^{nd}\)
• B. \(4^{th}\)
• C. \(7^{th}\)
• D. \(8^{th}\)

Hint:

Chloroquine is a 4-aminoquinoline derivative with chlorine at the \(7^{th}\) position.

Answer 1

The Correct Option is C

Concept:
Chloroquine is an antimalarial drug. Chemically, it is a 4-aminoquinoline derivative.

Step 1: Understanding chloroquine structure.
Chloroquine contains a quinoline nucleus. The chlorine atom is attached to the quinoline ring.

Step 2: Position of chlorine.
In chloroquine, the chlorine substituent is present at the \(7^{th}\) position of the quinoline ring.

Step 3: Importance of structure.
The quinoline ring and its substituents are important for the antimalarial activity of chloroquine.

Step 4: Checking options.
The chlorine is not at the \(2^{nd}\), \(4^{th}\), or \(8^{th}\) position. It is specifically at the \(7^{th}\) position.

Step 5: Final answer.
Therefore, chloroquine contains chlorine at the \(7^{th}\) position. \[ \boxed{7^{th}} \]