Test Index

NCERT Class XII Chemistry
Chapter - Biomolecules
Questions with Solutions

© examsnet.com
Question : 27 of 33
Marks: +1, -0
What products are expected when lactose is hydrolysed ?
Solution:  
Lactose (C12H22O11)(\mathrm{C}_{12}\mathrm{H}_{22}\mathrm{O}_{11}) on hydrolysis with dilute acid yields an equimolar mixture of D-glucose and D-galactose.
C12H22O11+H2O→H+C6H12O6+C6H12O6LactoseD-GlucoseD-Glucose\begin{array}{ccccccc} \mathrm{C}_{12}\mathrm{H}_{22}\mathrm{O}_{11} & + & \mathrm{H}_2\mathrm{O} & \xrightarrow{\mathrm{H}^+} & \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 & + & \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 \\ \text{Lactose} & & & & \text{D-Glucose} & & \text{D-Glucose} \end{array}
© examsnet.com
Go to Question:
Prev Question
Next Question