NPCIL Trainee Organic Chemistry — practice questions
20 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NPCIL Trainee Organic Chemistry in the app →Organic compounds that contain only the elements carbon and hydrogen are called:In alkanes, each carbon atom is best described as:What is the general molecular formula for a noncyclic (straight or branched-chain) alkane containing n carbon n-Butane and 2-methylpropane (isobutane) share the molecular formula C4H10 but differ in how their atoms are aThe largest database of organic compounds lists roughly how many known substances?In a pair of geometric isomers of an alkene, what actually differs between the two molecules?In 2-butene, the isomer with both methyl groups on the same side of the C=C double bond is called the:Alkenes are more reactive than alkanes because their C=C double bond can react in a way where the pi bond breaThe C-Cl portion of a chloroethane molecule is an example of a:When naming an alcohol from its parent hydrocarbon (e.g. pentane becoming pentanol), what change is made to thEthers contain the functional group -O- and have which general formula?Diethyl ether, the most widely used compound of its class, was first put to what use in 1846?Both aldehydes and ketones contain a carbonyl group. What structurally distinguishes the two?Formaldehyde (HCHO) is used for preserving tissue specimens and embalming bodies. What property of formaldehydDimethyl ketone, CH3COCH3, is the simplest ketone and is better known by what common name?Both carboxylic acids and esters contain a carbonyl group with a second oxygen atom bonded to the carbonyl carFormic acid, the simplest carboxylic acid, takes its name from the Latin word "formicus," which means:Acetic acid, CH3CO2H, constitutes approximately what percentage of ordinary vinegar?Amines are organic molecules defined by the presence of which type of bond?The ester ethyl acetate (CH3CO2CH2CH3) forms when acetic acid reacts with which alcohol?