Question

Which statements are correct about sucrose?

• A. IUPAC name of sucrose is $\alpha$-D-glucopyranosyl-$\beta$-D-fructofuranside
• B. IUPAC name of sucrose is $\beta$-D-fructofuranosyl-$\alpha$-D-glucopyranoside
• C. It is hydrolysed both by emulsin and amylase
• D. On hydrolysis, the solution is laevorotatory

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A IUPAC name of sucrose is $\alpha$-D-glucopyranosyl-$\beta$-D-fructofuranside
B On hydrolysis, the solution is laevorotatory
C IUPAC name of sucrose is $\beta$-D-fructofuranosyl-$\alpha$-D-glucopyranoside
D It is hydrolysed both by emulsin and amylase

(A) IUPAC name of sucrose is $\alpha$-D-glucopyranosyl-$\beta$-D-fructofuranside.
(B) IUPAC name of sucrose is $\beta$-D-fructofuranosyl-$\alpha$-D-glucopyranoside.
(C) It is hydrolysed both by emulsin and amylase. On hydrolysis it gives glucose and fructose. Hydrolysis can also be carried out by boiling with a dilute mineral acid or treatment with enzyme invertase.
(D) Sucrose is destrorotatory. On hydrolysis, the solution is laevorotatory. The solution contains a mixture of dextro rotatory glucose and laevo rotatory fructose.
Thus, all the four options are correct.