AIEEE 2010 Chemistry
Q. 15. For a particular reversible reaction at temperature T, 
were found to be both +ve. If Te is the temperature at equilibrium, the reaction would be spontaneous when .
Sol :
Answer: (2)
Q. 16. Biuret test is not given by
(1) carbohydrates
(2) polypeptides
(3) urea
(4) proteins
Sol :
Polypeptides, proteins and urea have
(peptide) linkage while carbohydrates have glycosidic linkages. So, test of carbohydrates should be different from that of other three. Biuret test produces violet colour on addition of dilute CuSO4 to alkaline solution of a compound containing peptide linkage.
Answer: (1)
AIEEE 2010 Chemistry
