Click the "draw structure" button to launch the drawing utility. Draw the product of the reaction of propanal with lithium aluminum hydride, followed by water.

Product: propan-1-ol

Explanation:

IIn this case, we have to remember that  is a reduction agent.  So, this is a reduction reaction. The has the ability to produce hydride ions . This ion can attack the carbonyl group generating a negative charge in the oxygen. In the next step, the negative charge in the oxygen can attack a water molecule to protonate the molecule and produce propan-1-ol.

See figure 1

I hope it helps!

since electrons are negative the answer is neagtaive