Question

given the data below, what substance does not show a reaction for any of the tests? hint: (+)= reaction occurred, (-)= no reaction
substance appearance litmus (ph) r - b base b - r acid vinegar biuret (protein) iodine (starch)
baking powder powder o + - +
baking soda powder base + - -
corn starch powder o - - +
gelatin crystal acid - + -
salt crystal o - - -
unknown crystal neutral + mixed mixed

Explanation:

Step1: Check each substance's reaction results

Examine the table for (-) in all test - columns.

Step2: Identify the substance

Salt has (-) for Litmus, Vinegar, Biuret, and Iodine tests.

Answer:

Salt