A positively charged molecule. This molecule consists of three hydrogen atoms bonded to an oxygen atom. What name is given to this molecule?

a. hydroxide ion.

b. glucose.

c. methane.

d. hydronium ion.

e. water.

The correct answer is d. hydronium ion.

Explanation:

Hydronium ion is a positively charged molecule that has three hydrogen atom bonded with an oxygen atom. Hydronium ion is formed when the water molecule gains an extra H + ion from somewhere.

This H + ion easily form bonds with one of the lone pairs present on the water molecules. H2O is also a polar molecule and has a partially positive charge due to which the extra H + ions get attracted to the negative pole of water and make hydronium ion. Therefore the correct answer is d.