Q18 of 26 Page 1

Write the structure of the major product in each of the following reactions:





i)


It is done by Markovnikoff reaction in which the alkene undergoes substitution when reacted with a hydrohalide. Thus, the halide group combines with the main chain by breaking the double bond.


ii)



The halide group is attacked by the alcoholic KOH, the double bond is formed followed by the removal of corresponding halide.



iii)




When Bromobenzene is reacted with in presence of anhydrous , it forms 1-Bromo 4-MethylBenzene.


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16

Give reasons for the following:

i) is less reactive at room temperature.


ii) is the strongest reducing agent amongst all the hydrides of Group 16 elements.


iii) Helium is used in diving apparatus as diluent for Oxygen.


 17

(a) Write the hybridisation and shape of the following complexes

i)


ii)


(Atomic number: Co = 27, Ni = 28)


b) Out of and CO, which ligand forms a more stable complex with a transition metal and why?


 19

Give reasons for the following:

i) Phenol is more acidic than ethanol


ii) Boiling point of ethanol is higher in comparison to methoxymethane


iii) on reaction with HI gives and as the main products not and


20

I) How will you convert the following:

a) to


b) Aniline to phenol


c) Ethanenitrile to ethanamine


II) Write the chemical equations involved when aniline is treated with the following reagents:


i) water


ii)


iii) HCl