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What does it mean by substance A in paper?
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.
Why you say that a paper or matchstick as a combustible substance?
Anything that can burn is a combustible substance.
how do you coat magnetism onto a paper?
Magnetism is a force not a substance. As such it can not be applied to paper.
Does each spot on the developed chromatography paper or plate represent one substance?
That is correct. Every chemical substance travels at its own speed when diffusing through paper, and so every substance will wind up at its own location on the paper or plate as the case may be.
Which substance changes the colour of pH paper into greenish?
This depends on the kind of pH paper.
Is paper a substance or mixture?
Paper is a mixture.
Is paper pure substance?
No.
What does it mean by substance A in paper?
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.
What substance or chemical is the paper that this is written on made of?
There is no paper here.
How can you determine if substance is acid or base?
pH paper and litmus paper
What is meant by water of crystallisation in a substance?
H
Why you say that a paper or matchstick as a combustible substance?
Anything that can burn is a combustible substance.
how do you coat magnetism onto a paper?
Magnetism is a force not a substance. As such it can not be applied to paper.
What is meant by a substance and a pure substance?
A substance might be pure with a single compound or impure with impurities along with principal compounds.
Is paper a substance that can preserve objects?
yes
What is meant by maiden of a boy?
it means he was a paper boy it means he was a paper boy
Which substance changes the colour of pH paper into greenish?
This depends on the kind of pH paper.
