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Differentiate between the principle of estimation of nitrogen in an organic compound by
(i) Dumas method
(ii) Kjeldahl’s method.
Which of the two : O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why ?
Give the IUPAC names of the following compounds :
Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.
Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens ?
Classify the following reactions in one of the reaction type studied in this unit.
(a) CH3CH2Br + HS− → CH3CH2SH + Br−
(b) (CH3)2C = CH2 + HCl → (CH3)2CCl—CH3
(c) CH3CH2Br + HO− → CH2 = CH2 + H2O + Br−
(d) (CH3)3C — CH2OH + HBr → (CH3)2CBrCH2CH3 + H2O
Write bond-line formulas for : Isopropyl alcohol, 2, 3- Dimethylbutanal, Heptan-4-one
Draw the resonance structures for the following compounds. Show the electron shift using curved- arrow notation. .
(a) C6H5NO2
(b) CH3CH = CHCHO
(c) C6H5—CHO
(d) CH3CH = C+H CH2
Indicate the s-and p-bonds in the following molecules
C6H6, C6H12, CH2Cl2, CH2 = C = CH2, CH3NO2, HCONHCH3
What are hybridisation states of each carbon atom in the following compounds?
CH2 = C = O, CHCH = CH, (CH3)2CO, CH2 = CHCN, C6H6.
