Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Chemistry

Which of the following properties of glucose cannot be explained by its open chain structure?

(i) Glucose does not form hydrogen sulphite with NaHSO₃.

(ii) On oxidation with HNO₃ glucose gives saccharic acid.

(iii) Glucose is found to exist in two different crystalline forms which are named as α and β.

Glucose is found to exist in two different α and β crystalline forms. These forms can be obtained by:

(i) The α form of glucose is obtained by crystallisation from a concentrated solution of glucose at 303 K.

(ii) The β form of glucose is obtained by crystallisation from a concentrated solution of glucose at 303 K.

(iii) The β form is obtained by crystallisation from hot and saturated aqueous solution at 371 K.

(iv) The α form is obtained by crystallisation from hot and saturated aqueous solution at 371 K.

Reduction of glucose by HI suggest that ____________.

The reaction of glucose with red P + HI is called ____________.

Which of the following reactions of glucose can be explained only by its cyclic structure?

Which is the least stable form of glucose?

A solution of D-glucose in water rotates the plane polarised light ____________.

The number of chiral carbon atoms present in cyclic structure α-D(+) glucose:

The α-D glucose and β-D glucose differ from each other due to difference in carbon atom with respect to its ____________.

The two forms of D-glucopyranose obtained from the solution of D-glucose are called ____________.

Choose the correct relationship for glucose and fructose:

The letter D and L in carbohydrates represent ____________.

The number of chiral carbons in ß-D(+) glucose is ____________.

Which one is correct?

Edge length of unit cell of chromium metal is 287 pm with a bcc arrangement. The atomic radius is of the order:

The edge length of fcc cell is 508 pm. If the radius of cation is 110 pm, the radius of anion is:

The density of a metal which crystallises in bcc lattice with unit cell edge length 300 pm and molar mass 50 g mol⁻¹ will be:

An element with atomic mass 100 has a bcc structure and edge length 400 pm. The density of element is:

Which one of the following reactions is not explained by the open chain Structure of glucose?

Solubility of gases in liquids decreases with rise in temperature because dissolution is an ______.