Which one of the following formulas represents an aldehyde?
a. ch3cooh
b. c2h5oh
c. c2h4o
d. c6h10o5

The chemical formula that represents an aldehyde is C2H4O. The answer is letter C. CH3COOH is a carboxylic acid. C2H5OH is an alcohol and C6H10O5 is an ether. An aldehyde has an alkyl group with a fromyl group attached to it or –CHO.

thats how its supposed to be

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.