Q4 of 36 Page 1

Define ambidient nucleophiles with an example?

Ambidient nucleophiles are those which contains more than one nucleophilic centre. For Exa: CN-, NO2- etc.

Nucleophilic Centre is the atom that is rich in electrons and attacks an electrophile.


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2

Why are medicines more effective in the colloidal state?

OR


What is the difference between an emulsion and a gel?


 3

Arrange the following in increasing order of base strength in the gas phase:

(C2H5)3N, C2H5NH2, (C2H5)2NH


 5

What is the basic structural difference between glucose and fructose?

OR


Write the products obtained after hydrolysis of lactose.


 6

Write balanced chemical equations for the following processes:

(i) XeF2 undergoes hydrolysis.


(ii) MnO2 is heated with conc. HCl.


OR


Arrange the following in order of property indicated for each set:


(i) H2O, H2S, H2Se, H2Te – increasing acidic character


(ii) HF, HCl, HBr, HI – decreasing bond enthalpy