What is the primary contributor to the sour taste in foods like lemons, vinegar and yoghurt?

Correct option is D

The correct answer is:(d) Acids

Explanation:
The sour taste in foods like lemons, vinegar, and yoghurt is primarily due to the presence of acids. For example:

• Lemons contain citric acid.
• Vinegar contains acetic acid.
• Yoghurt contains lactic acid, which is produced during the fermentation of milk.

These acids activate the sour taste receptors on the tongue, giving these foods their characteristic tangy flavor.

Information Booster:

• Acids like citric acid, lactic acid, and acetic acid are common organic acids found in various foods.
• pH level: Foods with a low pH (below 7) typically taste sour, as acids lower the pH of the food.
• Sourness from acids is a natural preservative effect, helping to inhibit bacterial growth.

Additional Information:

• (a) Alkaloids: Alkaloids are bitter-tasting compounds, not responsible for sourness.
• (b) Salts: While some salts can enhance flavors, they do not primarily contribute to the sour taste.
• (c) Bases: Bases taste bitter, not sour.