Question

Which of the following statements is a qualitative observation? A.The branch is three meters long. B.The substance tastes bitter. C.There are eleven students absent. D. The beaker contains four hundred milliliters of an unknown liquid.

Answer 1

There are two kinds of analysis: qualitative and quantitative

In quantitative we analyse the amount of something that is how much of something is present / the quantity. Ex: the length of branch of tree, number of students in class, volume of a liquid in a beaker.

In qualitative analysis we determine the kind of substance / quality of substance / nature of substance.

like: colour of a substance, odor of a substance or taste (bitter / sour / sweet etc) of a substance

So answer is : B.The substance tastes bitter