Which of the following best describes the taste of alkalis?

• A. Sweet
• B. Bitter
• C. Sour
• D. Salty

Answer: (B)

Verified step by step guidance

1. Understand that the question is about the taste characteristics of alkalis (basic substances) when they come into contact with taste receptors on the tongue.
2. Recall that taste sensations are generally categorized as sweet, sour, salty, bitter, and umami, and different chemical substances stimulate these tastes differently.
3. Recognize that alkalis, which are substances with a pH greater than 7, typically have a bitter taste due to their chemical nature and interaction with taste buds.
4. Contrast this with acids, which usually taste sour, and salts, which taste salty, to reinforce the association between alkalis and bitterness.
5. Conclude that the best description of the taste of alkalis is 'bitter' based on their chemical properties and sensory effects.