How are bases typically described in terms of their physical properties?

Bases are typically described as having a slippery or soapy feel due to their chemical properties. When bases come into contact with skin or other surfaces, they can feel smooth and slippery, which is a result of their ability to react with fats and oils, forming a soap-like consistency. This characteristic is also related to their function in neutralizing acids; during this reaction, they can produce a slippery product that enhances this tactile sensation.

The other options do not accurately capture the general physical properties that are associated with bases. While some bases might have varying viscosities or consistencies, the quintessential property that most bases share is the slippery feel, especially when dissolved in water. This property is widely recognized and is often mentioned in practical applications, such as in cleaning products that are alkaline in nature. Understanding these properties helps in identifying bases in both academic and real-world contexts.