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 ____________.

Acetone reacts with Grignard reagent to form:

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

Which one is correct?

In zinc blend structure:

A unit cell of BaCl₂ (fluorite structure) is made up of ____________.

The fraction of the total volume occupied by the atoms present in a simple cube is ____________.

How many lithium atoms are present in a unit cell with edge length 3.5 Å and density 0.53 g cm⁻³? (Atomic mass of Li = 6.94):

The distance between Na^– and Cl^– ions in NaCl with a density 2.165 g cm^–3 is __________.