Ncert-class 11-chemistry – unit 9- Hydrocarbons Welcome to your Ncert-class 11-chemistry - unit 9- Hydrocarbons 1. Saturated Hydrocarbons contain triple bonds single bonds ionic bonds double bonds None 2. Aromatic hydrocarbons are the derivatives : Methane Benzene Alkanes Paraffins None 3. Which of the following reacts with water to give ethane? $$CH_{4}$$ $$C_{2}H_{5}MgBr$$ $$C_{2}H_{5}OH$$ $$C_{2}H_{5}OC$$ None 4. The IUPAC name of the following compound is:$$CH_{2}=CH-CH(CH_{3})_{2}$$ 1,1-dimethyl-2-propene 1-isopropyl ethylene 3-methyl-1-butene 2-vinyl propane None 5. in the Wurtz reaction method of preparation of alkanes, the stoichiometric coefficient of Sodium is 2 3 5 1 None 6. Halogenation of alkanes is a Rearrangement reaction Addition reaction Substitution reaction Elimination reaction None 7. Which of the following has the lowest boiling point? 2,2-Dimethylpropane 2-Methylpropane 2-Methylbutane n-pentane None 8. The number of possible conformational isomers of ethane is One Two zero Infinite None 9. Choose which one from the given options is an incorrect statement. None Isopentane is 2-methylbutane Neopentane is 1,1-Dimethylpropane Tertiary (3º) butyl is 1,1-Dimethylethyl None 10. Which of these fuels given below is not a hydrocarbon? Hydrogen CNG LNG LPG None 11. During halogenation of alkanes, the halogens and alkane show a specific trend. Which of the following statements is not correct? For a given halogen the reactivity of hydrocarbon is in the order of 3º>2º>1º On chlorination monosubstituted product is formed while on bromination disubstituted products are formed. The reactivity of halogens is in the order $$F_{2}>Cl_{2}>Br_{2}>I_{2}$$ Bromine is less reactive than chlorine towards a particular alkane. None 12. \(C_{6}H_{6})\ is very good industrial solvent for: fats $$MgCl_{2}$$ $$NaCl$$ $$CaCO_{3}$$ None 13. Which of these is not a characteristic of aromatic Hydrocarbons? they may contain double bonds carbon atoms form a closed chain or ring they are special type of cyclic compounds carbon atoms form a an open chain None 14. Chlorination of alkanes is a photochemical process. It is initiated by the process of: heterolysis pyrolysis homolysis hydrolysis None 15. Cis-dicholoroethylene can be converted to trans-dicholorethylene by irradiations. During the interconversion. Both the 𝜋and σ bonds rotate along with the groups Both the 𝜋 and 𝜎 bonds are broken and reformed Only the 𝜋 bond is broken and reformed The C−Cl and C−H bonds are broken, H and Cl atoms interchanges their positions and new bonds are formed None 16. The ratio of sigma and pi bonds in benzene is : 1:1 2:3 6:1 4:1 None 17. in cycloalkanes carbon atoms form a zigzag chain a open coiled chain a closed chain or a ring a an open chain None 18. On monochlorination of 2−methylbutane, the total number of chiral compounds formed is: 2 6 8 4 None 19. The final product of chlorination of methane in the sun light is ? $$CH_{3}C_{2}$$ $$CHCl_{3}$$ $$CCl_{3}$$ $$CH_{2}Cl_{2}$$ None 20. boiling point of alkanes increases with increase in molecular mass decreases with increase in molecular mass is independent of branching is independent of molecular mass None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
