Who am I?
I can roughly measure pH value from 0-14.

Who am I? I am the base of food chain

Who am I? I depend on plants and animals

Who am I? I am a product of gypsum and am·used to making chalks and fire proof materials.

Who am I? I am derived from tomato and turn blue litmus into red.

Who am I? I am formed by the fusion of male and female gametes

Who am I?I depend on plants for food.

Who am I? I am called antichlor and am used to remove excess chlorine from clothes when treated with bleaching powder.

I am a root like structure. I can penetrate into the tissue of the host plant. I can absorb food and water from the host plants Who am I ?

Who am I? I am a compound of calcium and can be used for disinfecting drinking water as well as for decolourisation.

Who am I? I am a salt of potassium hydroxide and nitric .acid.