Tiêu đề UNIT 9. HYDROCARBONS.pdf ✅

Page| 1 13.HYDROCARBONS Single Correct Answer Type 1. Thermal decomposition of a) b) c) d) 2. Which of the following is not a petroleum product? a) Petrol b) Paraffin wax c) Bees wax d) Kerosene 3. A knocking sound is produced more in the engine when the fuel contains mainly: a) n-alkanes b) CO2 c) CO d) Lubricating oil 4. Reaction of HBr with propene in presence of peroxides gives: a) Isopropyl bromide b) 3-bromopropane c) Allyl bromide d) n-propyl bromide 5. The next higher homologue of C6H14 is: a) C7H14 b) C7H16 c) C7H10 d) C7H12 6. The reaction conditions used for converting 1,2-dibromopropane to propylene are a) KOH, alcohol ∆ b) KOH, water ∆ c) Zn, alcohol ∆ d) Na, alcohol ∆ 7. A gas formed by the action of alcoholic KOH on ethyl iodide, decolourises alkalineKMnO4. The gas is a) C2H6 b) CH4 c) C2H2 d) C2H4 8. Alkyne, C7H12, when reacted with alkaline KMnO4 followed by acidification with HCl gives a mixture of (CH3 )2CHCOOH + CH3CH2COOH,The alkyne C7H12 is a) 3-hexyne b) 2-methyl-2-hexene c) 2-methyl-3-hexene d) 3-methyl-2-hexyne 9. The relationship between acetylene and benzene is comparable to the relationship between propyne and a) Dimethyl benzene b) Neoprene c) Propyl benzene d) Mesitylene 10. Complete oxidation of one mole of an alkane forms 3 moles ofCO2. The alkane is a) CH4 b) C2H6 c) C3H8 d) C6H14 11. The ozonolysis of ethylene, acetylene and propylene respectively gives: a) HCHO, CHO—CHO and CH3CHO + HCHO b) CHO— CHO, HCHO and CH3CHO c) HCHO + CH3CHO, CHO—CHO and HCHO
Page| 2 d) CHO—CHO, CH3CHO + HCHO and HCHO 12. The reaction, CH2 = CH2 + CH3COCl AlCl3 → gives the product: a) CH3COCH2CH2Cl b) CH3. CH2. CH2Cl c) CH3COCH2. CH2COCH3 d) ClCH2CH2Cl 13. Alkyl halides react with dialkyl copper reagents to give a) Alkenyl halides b) Alkanes c) Alkyl copper halides d) Alkenes 14. The gas which is used for the artificial ripening of fruits is: a) C2H6 b) C2H2 c) C2H4 d) Marsh gas 15. CH3— C ≡ CH reacts with HCI to give: a) 2,2-dichloropropane b) 1,1-dichloropropane c) 1,2-dichloropropane d) 1-chloropropene 16. CH3CH3 + HNO3 675 K → ? a) CH3CH2NO2 b) CH3CH2NO2 + CH3NO2 c) 2CH3NO2 d) CH2 = CH2 17. Which of the following is produced when coal is subjected to destructive distillation? a) Methane b) Ethane c) Acetylene d) Coal gas 18. The product of the following reaction are: a) CH3COOH + CH3COCH3 b) CH3COOH + CH3CH2COOH c) CH3CHO + CH3CH2CHO d) CH3COOH + CO2 19. Methyl bromide heated with zinc in closed tube produces: a) Methane b) Ethane c) Ethylene d) Methanol 20. Aqueous solution of an organic compound, ′A′ on electrolysis liberates acetylene and CO2 at a node. ′A′ is a) Potassium acetate b) Potassium succinate c) Potassium citrate d) Potassium maleate 21. The reaction of alkanes with halogen is explosive in the case of:
Page| 3 a) F2 b) Cl2 c) I2 d) Br2 22. Which of the following is unsymmetrical alkene? a) 1-butene b) 2-hexene c) 1-pentene d) All of these 23. Which of the statement is wrong for alkanes? a) Most of the alkanes are soluble in water b) Their density is always less than water c) At room temperature some alkanes are liquid, some solid and other are gases d) All alkanes burn 24. Propane cannot be prepared from which reaction? a) CH3 − CH = CH2 B2H6 → OH − b) CH3CH2CH2I HI → P c) CH3CH2CH2COONa NaOH CaO, ∆ → d) None of the above 25. Nitrating mixture is a) Fuming nitric acid b) Mixture of conc. H2SO4 and conc. HNO3 c) Mixture of nitric acid and anhydrous zinc chloride d) None of the above 26. Cyclohexene on reaction with OsO4 followed by reaction with NaHSO3 gives a) cis − diol b) trans − diol c) Epoxy d) Alcohol 27. Al4C3 on hydrolysis yields a) Nitrogen gas b) Methane gas c) Hydrogen gas d) Carbon dioxide 28. The compounds P, Q and S where separately subjected to nitration using HNO3 H2SO4 mixture. The major product formed in each case respectively, is
Page| 4 a) b) c) d) 29. Which of the following is not a mixture of hydrocarbons? a) Candle wax b) Kerosene c) Vegetable oils d) Paraffin oil 30. C8H10(A) O3/H2O → acid(B) C3H5MgBr(C) CO2, H3O + → acid B Identify A, B and C a) b) c) CH3 − CH2 − CH2 − CH3, CH3CH2CH2COOH, CH2 = CH − CH2MgBr d) 31. Which of the following has the maximum heat of hydrogenation? a) b) c) d) 32. CH3CH2CH3 400 − 600°C → X + Y,X and Y are