What are the charges on $H$ and $O$ atoms in a water molecule, respectively?

Which vitamins are water-soluble?

Find out a qualitative test for proteins,fats and oils,amino acids and test any fruit juice,saliva,sweat and urine for them.

Which of the following types of water is found in the highest amount in the protoplasm?

Match the names of items listed under column $I$ with the items given under column $II$; choose the answer which gives the correct combination of the alphabets of the two columns.

Column $-I$	Column $-II$
$(A)$ Ketone	$(p)$ Has $5$ carbon sugar,a phosphate group and a nitrogenous base
$(B)$ Fatty acid	$(q)$ Has long chain of carbon and hydrogen atoms and a carboxyl group at one end
$(C)$ Aldehyde	$(r)$ Has a carbonyl group at the end of the carbon chain
$(D)$ Nucleotide	$(s)$ Has a carbonyl group within the carbon chain

$ATP$ stands for: