Question 12
a solution with a bitter taste and a slippery feel is most likely
a)an acid
b)a base
c)salt
d)an ester

The solution is B) A base.  

The substance can be classified into different category based upon two criteria namely physical properties and chemical properties. The color, texture, appearance, smell, etc., are considered as physical properties whereas the boiling and melting point, etc., are considered as chemical properties.

When a solution tastes bitter and is soapy to touch they are called base. If a solution is sour in taste and is corrosive it is acid. Esters are sweet in smell and have variety of taste and appearance.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )