EXERCISE-2

Following are the structure of $\mathrm{D}-$glucose and $\mathrm{D}$-galactose

Which of the statement is correct about these compounds: 

$\mathrm{D}$-Glucose is treated with an excess of acetic anhydride in the presence of pyridine. Identify the products formed.

The product formed in the reaction is:

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CHOHCOC}}_6{\mathrm{H}}_5\stackrel{{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NHNH}}_2\left(\mathrm{excess}\right)}{\to }$

$\left(+\right)$-Sucrose has a specific rotation of $+66.5°$, while $\mathrm{D}-\left(+\right)$-glucose and $\mathrm{D}-\left(-\right)-$fructose have specific rotations $+52.5°$ and $-92.4°$ respectively. After complete hydrolysis of $\left(+\right)-$surcose by dilute acid, what will be the specific rotation of the hydrolysis product, called invert sugar [$a 1 : 1$ mixture of $\mathrm{D}-\left(+\right)$-glucose and$\mathrm{D}-\left(-\right)$-fructose]?

Consider the following statements:

Consider the following statements about sucrose.

Alanine, at its isoelectric point, exists in solution as:

Which of the following do not undergo hydrolysis: