Question

The specific rotation of D−glucose is +112.2. (a) What is the specific rotation of α−L−glucose?

		+112.2
		-52.7
		-112.2
		+52.7

Optical rotation of 10 g Glucose in 100 ml water is observed to be 4 °. ( L is 1dm) Calculate Optical activity.

		0.04
		14.3
		0.004
		1.43

Suppose you want to prepare 100 ml of buffer with pH of 5. Calculate volume of Acetic acid and sodium acetate that you need to make this buffer. acetic acid and sodium acetate (both 0.1M) and pKa is 4.75

		64.1 ml acetic acid, 35.9 ml sodium acetate
		35.9 ml acetic acid, 64.1 ml sodium acetate
		50.0 ml acetic acid, 50.0 ml sodium acetate
		80.0 ml acetic acid, 20.0 ml sodium acetate

Answer 1