The correct property of bases from the options you provided is: feels slippery.
Here’s a brief explanation of why the other options are not properties of bases:
- pH less than 7: This is characteristic of acids, not bases. Bases typically have a pH greater than 7.
- sour taste: This is also a characteristic of acids. Bases usually have a bitter taste.
- releases hydrogen ions in water: Bases do not release hydrogen ions; they release hydroxide ions (OH⁻) in water.
So, the property that describes bases correctly is that they feel slippery.