Dimensions of Unit Cells, Class 12 Chemistry NCERT Solutions

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. If an element crystallizes as a simple cube, what is the volume of an element provided its density is 1.5 g/cm³ and atomic mass of the element is 63?

69.7 x 10 ^-23 cm³

6.97 x 10 ^-23 cm³

.63 x 10 ^-23 cm³

5.97 x 10 ^-23 cm³

Your comments:

Question 1 of 10

2. Mass of an atom in an unit cell is calculated by which of the following formula if M is the molar mass:

A

B

C

D

Your comments:

Question 2 of 10

3. In the frmula to calculate the density of a unit cell what is z ?

Volume of unit cell.

Number of atoms in a unit cell.

Mass of atoms in a unit cell.

Molar mass of unit cell.

Your comments:

Question 3 of 10

4. Volume of a body centred cubic unit cell is

A

B

C

D

Your comments:

Question 4 of 10

5. Density of a unit cell is equal to mass of unit cell divided by

volume of 4 unit cells.

volume of unit cell.

volume of one molecule.

volume of an atom.

Your comments:

Question 5 of 10

6. Volume of a face centred cubic unit cell is:

A

B

C

D

Your comments:

Question 6 of 10

7. The number of atoms (z) in simple cubic unit cell is

one

two

three

four

Your comments:

Question 7 of 10

8. X-ray diffraction studies show that copper crystallizes in an fcc unit cell with cell edge of 3.608 x 10^-8 cm. In a separate experiment, copper is determined to have a density of 8.92 g/cm³, calculate the atomic mass of copper.

87.3 g/mol

15.8 g/mol

63.1 g/mol

36.0 g/mol

Your comments:

Question 8 of 10

9. An element with bcc geometry has atomic mass 50 and edge length 290 pm. The density of unit cell will be

8.16 g/cm³

6.81 g/cm³

68.1 g/cm³

1.86 g/cm³

Your comments:

Question 9 of 10

10. Sodium atom crystallizes in bcc lattice with cell edge (a) = . The radius of sodium atom will be:

A

B

C

D

Your comments:

Question 10 of 10

 Loading...