Brown ring in the test of NO₃^-  is formed due to the formation of :

• FeSO₄ ^. NO

• [Fe(SO₄)₂ ^. NO] H₂O

• Fe(SO₄)₃ ^. NO

• none of these

Which kind of fission is favoured by sunlight ?

• Heterolytic fission

• Homolytic fission

• Both (a) and (b)

• None of the above

Which type of isomerism is shown by propanal and propanone ?

• Functional group

• Metamerism

• Tautomerism

• Chain isomerism

The correct order of ease of dehydration of following is :

• I > II > III

• III > II > I

• I > III > II

• III > I > II

Among the following L-serine is

156.

Among the following which one can have a meso form?

• CH₃CH(OH)CH(Cl)C₂H₅

• CH₃CH(OH)CH(OH)CH₃

• C₂H₅CH(OH)CH(OH)CH₃

• HOCH₂CH(Cl)CH₃

The major product obtained on the monobromination (with Br₂/FeBr₃) of the following compound A is

Which of the following molecules is most suitable to disperse benzene in water?

Among the following the strongest nucleophile is

• C₂H₅SH

• CH₃COO^-

• CH₃NH₂

• NCCH₂^-

Among the following the most stable compound is

• cis-1,2-cyclohexanediol

• trans-1,2-cyclohexanediol

• cis-1,3-cyclohexanadiol

• trans-1,3-cyclohexanediol.