Question

Which of the following statement is false?

• A. Chlorophyll is responsible for synthesis of carbohydrates
• B. Haemoglobin forms oxyhaemoglobin in presence of oxygen
• C. Acetyl salicylic acid is aspirin
• D. Vitamin B\(_{12}\) contains Mg\(^{2+}\) ion

Hint:

Chlorophyll → Mg\(^{2+}\), Vitamin B\(_{12}\) → Co\(^{3+}\).

Answer 1

The Correct Option is D

To determine which statement is false, we will analyze each option based on chemical and biological knowledge:

1. Chlorophyll is responsible for the synthesis of carbohydrates: This statement is true. Chlorophyll is a green pigment found in plants, responsible for absorbing light to provide energy for the process of photosynthesis, during which carbohydrates are synthesized.
2. Haemoglobin forms oxyhaemoglobin in the presence of oxygen: This statement is true. Haemoglobin in the blood binds with oxygen to form oxyhaemoglobin, which is crucial for transporting oxygen from the lungs to tissues and organs.
3. Acetyl salicylic acid is aspirin: This statement is true. Acetyl salicylic acid is the chemical name for aspirin, a commonly used anti-inflammatory drug.
4. Vitamin B₁₂ contains Mg²⁺ ion: This statement is false. Vitamin B₁₂, also known as cobalamin, contains a cobalt ion (Co³⁺), not magnesium (Mg²⁺). The presence of cobalt is a key characteristic of this vitamin.

Thus, the false statement is: Vitamin B₁₂ contains Mg²⁺ ion.