If it is adulterated a black colour will be formed :D
Pumice does not react with hydrochloric acid.
it turns red colour
No reaction
There is no reaction.
Turmeric (curcumine) remain yellow in acidic solutions.
turmeric dissolved in water is treated with citric acid(lemon or juice of any citrus fruit) red color is formed due to the reaction of phenol(in turmeric) with trioic acid present in citric acid
Solid Zinc reacting with Hydrochloric Acid is a single replacement Oxidation/Reduction reaction.
No, it is a single displacement reaction. It can also be called a redox reaction. It is not an acid base reaction because although hydrochloric acid is obviously and acid, magnesium is a metal, not a base.
It could stop because there wasn't enough magnesium or hydrochloric acid for the reaction to go to completion.
an acid base reaction
Carbonic acid gives an acid salt but hydrochloric acid does not
No change