Student B because it requires a hypothesis
Answer:
different acids include acetic acid,lactic acid,tartaric acids DNA(deoxyribonucliec acid) .
different bases include calcium oxide Potassium hydroxide ,Sodium hydroxide and Barium hydroxide .
Answer: Option (C) is the correct answer.
Explanation:
A water molecule is made up of two hydrogen atoms and one oxygen atom. Its molecular formula is
.
It is known that hydrogen is electropositive in nature whereas oxygen is electronegative in nature. Therefore, oxygen will pull the electron of hydrogen towards itself as a result, there will be formation of partial positive charge on hydrogen and partial negative charge on oxygen atom.
Thus, the water molecule becomes polar. So, we can conclude that water molecule is a polar molecule because water molecules have a positive charge on one end and a negative charge on the other.