Asmall amount of a dense white powder was mixed with water in a test tube. the white powder did nor sink or float in the test tube. as few drops of universal indicator were added and the solution turned green. this means that the white powder was added
a. soluble neutral substance.
b. slightly soluble alkali
c. slightly soluble acid.
d. slightly solubility extra large up stance.

A. Soluble neutral substance.

Explanation:

A small amount of a dense white powder was mixed with water in a test tube. The white powder did nither sink nor float in the test tube which proves that it is soluble in water that means soluble substance.

The few drops of universal indicator were added in the test tube and the solution turned green in colour which proves that it is neutral substance.

Both the conditions proves that it is soluble neutral substance.

im not exactly sure but i think its b!