A compound is more acidic when the bond between two molecules is weaker? (No. It is more acidic when the conjugate base is more stable and the acid is less stable. - GS).  Is a primary compound  less acidic than secondary and a secondary compound  less acidic than tertiary? (No. It depends on a specific acid-base pair. - GS). So basically if its attached with a triple bond its more acidic than if it were attached with a double bond and so on? (If you mean hydrogen attached to a carbon connected with a multiple bond - yes. - GS).