Sucrose in water is dextrorotatory, `[alpha]_(D)=+66.4^(@)` when boiled with dil. HCl, the solution becomes leavorotatory , `[alpha]_(D)=-39.9^(@)`,.

Question

Sucrose in water is dextrorotatory, `[alpha]_(D)=+66.4^(@)` when boiled with dil. HCl, the solution becomes leavorotatory , `[alpha]_(D)=-39.9^(@)`,.

Sucrose in water is dextrorotatory, `[alpha]_(D)=+66.4^(@)` when boiled with dil. HCl, the solution becomes leavorotatory , `[alpha]_(D)=-39.9^(@)`,. In this process the sucrose breaks into
A. L-glucose +D-fructose
B. L-glucose+L-fructose
C. D-glucose+D-fructose
D. D-glucose+L-fructose

Monjur Alahi

7 views

2025-01-04 04:42

1 Answers

Related Questions

A nucleus with Z =92 emits the following in a sequence: `alpha,beta^(-),beta^(-),alpha,alpha,alpha,alpha,alpha,beta^(-),beta^(-),alpha,beta^(+),beta^(

2 Answers 5 Views

A solution of sucrose (molar mass =342 g `mol^(-1)`) has been prepared by dissolving 68.5 g of sucrose in 100 g of water. The freezing point of the so

2 Answers 4 Views

If `A=[alphabetagamma-alpha]` is such that `A^2=I` , then `1+alpha^2+betagamma=0` (b) `1-alpha^2+betagamma=0` (c) `1-alpha^2-betagamma=0` (d) `1+alpha

2 Answers 5 Views

If a variable takes the discrete values `alpha-4`, `alpha -(7)/(2), alpha-(5)/(2), alpha-2,alpha+(1)/(2), alpha-(1)/(2), alpha+5(alpha gt 0)`, then th

2 Answers 4 Views

A solution of sucrose (molar mass `=342 g mol^(-1)`) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the s

2 Answers 4 Views

Prove that `tan alpha+2 tan 2 alpha+2^(2)tan^(2)alpha+..............+2^(n-1)tan2^(n-1)alpha+2^(@)cot2^(@)alpha=cotalpha`

2 Answers 6 Views

If `A(alpha, beta)=[("cos" alpha,sin alpha,0),(-sin alpha,cos alpha,0),(0,0,e^(beta))]`, then `A(alpha, beta)^(-1)` is equal to

2 Answers 6 Views

If `alpha, beta, gamma` are three real numbers and `A=[(1,cos (alpha-beta),cos(alpha-gamma)),(cos (beta-alpha),1,cos (beta-gamma)),(cos (gamma-alpha),

2 Answers 4 Views

If `f(x)=x^(11)+x^9-x^7+x^3+1` and `f(sin^(-1)(sin8)=alpha,alpha` is constant, then `f(tan^(-1)(t a n8)` is equal to `alpha` (b) `alpha-2` (c) `alpha+

2 Answers 5 Views

The value of `(alpha^3)/2cos e c^2(1/2tan^(-1)alpha/beta)+(beta^3)/2sec^2(1/2tan^(-1)(beta/alpha))i se q u a lto` `(alpha+beta)(alpha^2+beta^2)` (b) `

2 Answers 5 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - C
The aqueous solution of sucrose is dextrorotatroy having `[alpha]_(D)=+66.4^(@)`. On hydrolysis with dilute acids or enzyme invertase, can sugar (sucrose) gives equimolar mixture of D-(+)-glucos and D-(-)-fructose
`underset([alpha]_(D)=66.4^(@))underset("cane sugar")(C_(12)H_(22)O_(11))+H_(2)O overset(HCl)tounderset([alpha]_(D)=+52.5)underset("D-glucose")(C_(6)H_(12)O_(6))+underset([alpha]_(D)=-92.4^(@))underset("D-fructose")(C_(6)H_(12)O_(6))`
So, sucrose is dextrorotatory but after hydrolysis gives dextrorotatory glucose and laevorotatory fructose. D-(-)-fructose has a greater specific rotation than D-(+)-glucose. therefore, the resultant solution is laeovorotatory in nature with specific rotation of `-39.9^(@)`.