CBSE Important Questions

CBSE Guess > Papers > Important Questions > Class XII > 2007 > Chemistry > Solid States

Solid States

Previous Index Next

Q. 1. A sample of solid scatters a beam of Xrays from a crystal plane at an angle of 11.80. Find the wave length of e crystal if inter planar distance is 0.3nm and it is a first order diffraction.

Q. 2. A sample of crystalline solid scatters a beam of Xrays of λ = 2.3A0 at an angle of 2θ=2708’. If it is a first order diffraction find the interplanar distance.

Q. 3. Iron(II) oxide crystallize as Fe 0.93O. Find the %Fe2+ and Fe3+ in this compound.

Q. 4. A solid AB has Nacl structure. If the radius of cation is 100pm, what is the possible maximum and minimum radius of anion B.

Q. 5. If the radius of Mg2+, Cs+, O2-,S2- and Cl- ion are 0.65A0, 1.69A0,1.40A0,1.84A0 and 1.81A0 respectively. Find the Coordination numbers of cation in MgO,MgS, and CsCl.

Q. 6. In corundum, Oxide ion are in hcp and Al3+ ion occupy 2/3 of the Octahedral void.What is the formula of corundum?

Q. 7. A Cubic solid is made up of 2 elements P and Q .Q occupies the corners of the cube and P at the body centre.What is the formula of the compound?. What are the coordination Numbers of Pand Q?

Q. 8. In a crystalline solid anion C occupies Ccp,cation A occupy 50% tetrahedral void and cation B occupies 50% octahedral void. What is the formula of the solid?

Q. 9. If Nacl is doped with 10-3mole% of Srcl2. What is the concentration of Cation Vacancies?

Q. 10. Sodium metal crystallizes in bcc. a = 4.3A0 What is the radius of Sodium atom?

Q. 11. Copper crystallize in Fcc with a density of 9 g/cm3. Calculate the radius of Copper atom (Atomic mass of copper = 63).

Q. 12. Chromium crystallize in bcc with an atomic diameter of 250 pm. Determine the density of unit cell. (Atomic mass of Cr=52).

Q. 13. Calculate the value of Avagadronumber D of Nacl =2.165g/cm3. Distance between Na+ and Cl- is 281pm (Molar mass of Nacl = 58.5.).

Q. 14. Cs Br has bcc structure. a = 400pm. Calculate the distance between Cs+ and Br-.

Q. 15. KF has Nacl structure . Find the distance between K+ and F-- D = 2.5 g/cm3. Molar mass of KF = 58.

Q. 16. An element crystallizes as bcc. a=288pm. D = 7.2g/cm3. How many atoms are there in 208g of this element?

Q. 17. CuCl has ZnS structure. D=3.4g/cm3 Find the edge length of the unit cell ( molar mass of CuCl=99)

Q. 18. An element crystallizes in FCC with an edge length of 200pm. Calculate its density if 200g of this element contains 24 x 1023 atoms.

Q. 19. Unit cell of an element has atomic mass 108. D=10.5 g /cm3. Edge length =409pm. Find the structure of the crystal lattice .

Q. 20. An element crystallizes into a structure which is a cubic type unit cell having one atom at each corner and two atoms in one of its diagonal. Volume of unit cell is 24 x 10-24cm3 D = 7.2g/cm3. Find the number of atoms in 200g of this element.

 

Chemistry Links
1. Numericals
2.

Atomic Structure

3.

Solid States

4.

Thermodoynamics

5.

Electrochemistry

6.

Chemical Kinetics

7.

Nuclear Chemistry

Previous Index Next