Hydrocarbon – Online Test

1. Which of the following compounds is insoluble even in hot concentrated H2SO4?


2. The increasing order of reduction of alkyl halides with zinc and dilute HCl is –


3. Which of the following is correct statement?


4. Arrange the following carboanions in order of decreasing stability-

A. H3C – C ≡ C

B. H – C ≡ C

C. H3C – CH2


5. Ozonolysis of an alkene produces only one dicarbonyl compound. The structure of the alkene is –


6. The number of possible alkynes with molecular formula C5H8 is –


7. Arrange the following hydrogen halides in order of their decreasing reactivity with propene.


8. For an electrophilic substitution reaction, the presence of a halogen atom in the benzene ring ………………?


9. Reduction of 2-butyne with sodium in liquid ammonia gives predominantly –


10. Acetylenic hydrogens are acidic because –


11. Which of the following compounds has lowest boiling point?


12. Reaction of HBr with propene in the presence of peroxide gives –


13. When HCl gas is passed through propene in the presence of benozyl peroxide, it gives –


14. Products of the following reactions –





15. In Fridel – crafts reaction, toluene can be prepared by –


16. The reactive species in the nitration of benzene is –


17. Using anhydrous AlCl3 as catalyst, which one of the following reactions produces ethyl benzene (PhEt)?


18. The oxidation of toluene with CrO3 in the presence of (CH3CO)2O gives a product, A which on treatment with aqueous NaOH produces –


19. A hydrocarbon A on chlorination gives B which on heating with alcoholic potassium hydroxide changes into another hydrocarbon C. The  later decolourises Baeyer’s reagent and on ozonolysis forms formaldehyde only. A is –


20. Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by –


21. Alkane When ethylene bromide is treated with Zn, we get –


22. Alkynes when reduction with sodium in liquid ammonia gives –


23. With the increase in branching, the boiling point –


24. Alkyl halides gives alkenes when treated with –


25. Propane when treated with concentrated nitric acid at 723 K gives –


Question 1 of 25

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