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

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 ______.

All elements of Group 15 show allotropy except ______.

In the following reaction, identify A and B:

\[\begin{array}{cc}
\ce{C6H12O6 ->[Acetic anhydride] A}\\
\downarrow \text{Conc. nitric acid}\phantom{...}\\
\ce{B}\phantom{.................}\end{array}\]

The percentage of empty space in a body centred cubic arrangement is ______.

Match the type of unit cell given in Column I with the features given in Column II.

K_H value for \[\ce{Ar(g)}\], \[\ce{CO2(g)}\], \[\ce{HCHO (g)}\] and \[\ce{CH4(g)}\] are 40.39, 1.67, 1.83 × 10^–5 and 0.413 respectively. Arrange these gases in the order of their increasing solubility.

Explain the solubility rule “like dissolves like” in terms of intermolecular forces that exist in solutions.

What is the significance of Henry’s Law constant K_H?