Difference between mixtures and compounds

[gracy]

i know in mixture two or more substance are not chemically bonded whereas in compounds substance are chemically bonded and also in mixtures substance can be separated by mechanical method but not compounds But i want to ask how can i identify whether substance is mixture or compound if it comes in theory exam there i cannot separate them ,nor can i predict whether substance are chemically bonded or not,how can i answer questions whether substance is mixture or compound in theory exams ? .

 

[Borek]

Substance must be described in a way that makes it clear what it is, or it will be a substance that you are expected to know something about.

Can you give examples of such questions?

 

[gracy]

Substance must be described in a way that makes it clear what it is, or it will be a substance that you are expected to know something about.

Can you give examples of such questions?

For example wood.I never thought that wood is a mixture.

 

[Borek]

Now you know.

 

[gracy]

Now you know.

yes but i mean lots of examples would be out there about which i don't know,so is there any way with the help of which i can tell whether substance is mixture or compound just by reading it's name in question paper(i.e without any experiment,theoretically for theory exams .Not by practically or observing)

 

[Borek]

Most of the things you deal with on a daily basis are mixtures. Notable exceptions that I can think of at the moment are distilled (DI, RO) water (but potable water is already a mixture containing dissolved salts), table salt (although some kinds are not so pure, they contain artificially added iodides or other microelements) and white sugar.