Which among the given options is correct with respect to bases?
Among the given options soapy to touch is correct with respect to bases. Bases feel soapy to touch because they react with acidic molecules in your skin called fatty acids. So, when a base touches your skin, the combination of the base with your own fatty acids actually makes a small amount of soap. Other options such us sour to taste and turns blue litmus red are properties of acids. Oil of vitriol(sulphuric acid) is an example of acid, not a base.