1. Arrange the following hydrogen halides in order of their decreasing reactivity with propane.

2. Identify the compound A and B in the following reaction sequence

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

4. Arrange the following in decreasing order of their boiling points.

(A) n–butane (B) 2–methylbutane

(C) n-pentane (D) 2,2–dimethylpropane

5. Which one of these is not true for benzene?

6. Nitrobenzene on reaction with conc. HNO₃/H₂SO₄ at 80 – 100°C forms which one of the following products?

7. Hydrocarbon containing following bond is most reactive

8. Presence of a nitro group in a benzene ring

9. An organic compound has a triple bond and not double bond. It can be test by

10. Alkyl halides react with dialkyl copper reagents to give?

11. 2 – Phenylpropene on acidic hydration gives

12. The coal tar fraction which contains phenol is:

13. The catalyst used in Friedel – Crafts reaction is

14. The first fraction obtained during the fractionation of petroleum is:

15. Tetrabromoethane on heating with Zn gives

16. The compound C₃H₄ has a triple bond, which is indicated by its reaction with

17. When 2-butyne is treated with dil.H₂SO₄/HgSO₄, the product formed is

18. The lowest alkene, that is capable of exhibiting geometrical isomerism is

19. Isopropyl bromide on Wurtz reaction gives

20. The position of double bond in alkenes can be located by :