What is the taste of acid?

Which is not a property of acids?

Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?

Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution?

Factory wastes contain _________

Sodium hydroxide is a/an ________

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are

________ Acid is present in Tamarind