MCQ Class 11 Chemistry Chapter 9 Hydrocarbons Advertisement MCQ’s For All Chapters – Chemistry Class 11th 1. What are hydrocarbons?Compounds containing carbon, hydrogen and oxygenCompounds containing carbon and hydrogen onlyCompounds containing hydrogen and oxygen onlyCompounds containing carbon and nitrogenQuestion 1 of 202. What is the general formula of alkanes?CnH2nCnH2n−2CnH2n+2CnHnQuestion 2 of 203. Which of the following is the first member of the alkane family?EthaneMethanePropaneButaneQuestion 3 of 204. What type of bonds are present in saturated hydrocarbons?Only carbon-carbon single bondsCarbon-carbon double bondsCarbon-carbon triple bondsBoth double and triple bondsQuestion 4 of 205. Which molecular formula represents ethane?CH4C2H4C2H6C3H8Question 5 of 206. What is the general formula of alkyl groups?CnH2n+2CnH2n+1CnH2nCnHn−2Question 6 of 207. How many chain isomers does C5H12 have?OneTwoThreeFourQuestion 7 of 208. Which carbon atom is attached to three other carbon atoms?Primary carbonSecondary carbonTertiary carbonQuaternary carbonQuestion 8 of 209. What is the process of adding hydrogen to alkenes or alkynes to form alkanes called?HydrogenationDecarboxylationIsomerisationAromatisationQuestion 9 of 2010. Which catalyst can be used for hydrogenation of unsaturated hydrocarbons?Sodium chloridePlatinumCalcium oxideAluminium oxideQuestion 10 of 2011. What is Wurtz reaction used for?Preparation of higher alkanesPreparation of alcoholsPreparation of acidsPreparation of aromatic compoundsQuestion 11 of 2012. What is the process of removal of carbon dioxide from a carboxylic acid salt called?HydrogenationDecarboxylationPolymerisationHalogenationQuestion 12 of 2013. What is the physical nature of alkanes?Highly polarIonicAlmost non-polarStrongly acidicQuestion 13 of 2014. Which members of the alkane series are gases at 298 K?C1 to C4C5 to C17C18 and aboveC10 to C20Question 14 of 2015. What happens to the boiling point of alkanes as molecular mass increases?It decreases continuouslyIt remains constantIt generally increasesIt first increases and then becomes zeroQuestion 15 of 2016. Which type of reaction occurs when hydrogen atoms of alkanes are replaced by halogens?Addition reactionSubstitution reactionElimination reactionPolymerisation reactionQuestion 16 of 2017. What is the general nature of combustion of alkanes in sufficient oxygen?Formation of nitrogen and hydrogenFormation of carbon dioxide and waterFormation of carbon monoxide onlyFormation of methaneQuestion 17 of 2018. What is the decomposition of higher alkanes into smaller molecules by heat called?PyrolysisHydrogenationNitrationSulphonationQuestion 18 of 2019. What are conformations?Different compounds having different molecular formulasSpatial arrangements interconvertible by rotation around a C–C single bondCompounds having different functional groupsCompounds formed by oxidationQuestion 19 of 2020. Which conformation of ethane is more stable?EclipsedSkewStaggeredBentQuestion 20 of 20 Loading...
Leave a Reply