Paper is a mixture.
No.
Formeldehyde is a substance used to preserve dead bodies.
A base/alkali substance will turn litmus paper blue.
pigmaent
they used a thin paper substance to preserve the bodies
Use SAP & avoid paper
Paper is a mixture.
molecules'
to turn it into a rubbery substance and to preserve it
cellophane paper, tracing paper and wax paper.
No.
If you mean what substances are present in paper, then it is principally cellulose. If you are asking about substance A in a question paper, it's a way of referring to an unknown substance so it can ask you questions based on the information given about it. For instance, if it says 'substance A turns damp red litmus blue' then you know that substance A is an acid.
There is no paper here.
In brown butcher paper in fridge.
Always strive to preserve your dignity. Our fore fathers fought to preserve our freedom. I like to eat strawberry preserves. We need to preserve our natural resources. WD-40 preserves metal objects against rust.
Vinager is used to preserve cucumbers, which makes pickles.