`alpha`-D glucose and `beta`-D -glucose are

Options

A. `+ 19^@`
B. `+112^@`
C. `+52^@`
D. `+100^@`

Answer

C

Explanation

Specific rotation of equilibrium mixture of `alpha` - D- glucose and `beta` - D–glucose (where pure `alpha` - D–glucose has specific rotation = +112.`2^@` and `beta` - D–glucose has specific rotation is + `19^@` is 52.`6^@` Hence correct option is (c).