Answer:
You did not provide any details about the experiment, nor provided any answers for us from which to choose "the best answer" from. Please refine your question next time.
Explanation:
Answer: (1) functional groups
Explanation:
Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.
The compounds having similar molecular formula but different arrangement of atoms or groups in space are called isomers and the phenomenon is called as isomerism.
Butanal is and butanone is .
and are functional isomers which have same molecular formula , similar masses and same number of carbon atoms per molecule but different functional groups attached.
Answer:
Heating the CuSO4. 5H2O crystals causes then to loose the water of crystallisation that is the 5H2O part. It becomes anhydrous copper sulphate. Its colour changes to white from blue.
The answer is either A or C. Sorry I'm not much help :)