Rewrite the sentence so that it contains the word in capitals
b. If a substance does not contain hydrogen, then it can't be an acid
c. If we put some litmus paper in a solution and it turns red, then the solution must be an acid
d. If we add a substance to a red-cabbage solution and it stays red, then the substance can't be an alkali
e. If we add a substance to a red-cabbage solution and it turns green, then the substance must be an alkali
f. If we put some litmus paper in a solution and it turns red, then the solution can't be an alkali
g. If it's not an acid, or an alkali, then it can't be neutral
h. If we use a universal indicator to check a substance, and it turns purple, then the substance can't be an acid