The most difficult organic chemistry riddles A list of organic chemistry related questions that are most often answered incorrectly Chemistry quiz How many Structural Isomers does the hydrocarbon Hexane have? 6 5 4 None of the Above Hexane has 5 structural isomers. Namely, these are 2-methylpentane; 3-methylpentane; 2,2-dimethylbutane; 2,3-dimethylbutane and 3,3-dimethylbutane. Ananway Ashish Share and bring new players to the game! Correct this question 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Hexane#:~:text="Hexane" can mean any of,other 4 having different names. 0 Very interesting! What is the effect of nicotinic acid on human organism? it is neutral It is harmful, causes cancer It is highly toxic, kills in 10 seconds It is essential for functioning Nicotinic acid, better known as niacin or vitamin B3, has nothing in common with tobacco. Chronic lack of niacin leads to pellagra, a vitamin deficiency disease. globalquiz.org Share and bring new players to the game! Correct this question 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Pellagra 5 Very interesting! nicotine riddles Which acid causes the sourness of green apples? citric acid malic acid lactic acid formic acid Malic acid is more sour than citric acid, and is the source of extreme tartness in so-called extreme candy. Malic acid occurs naturally in all fruits and many vegetables. Kasia Share and bring new players to the game! Correct this question -1 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question 3 Very interesting! apples riddles What is the common name for acetylsalicylic acid? LSD vitamin C citric acid aspirin Aspirin has an antiplatelet effect. Low doses of aspirin may be given immediately after a heart attack to reduce the risk of another heart attack or of the death of cardiac tissue. globalquiz.org Share and bring new players to the game! Correct this question 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question 0 Very interesting! pharmacy riddles Play and see more questions Chemistry quiz