Solid State Class 12 MCQ Test

1.The edge length of a face centred cubic unit cell is 508 pm.If the radius of the cation is 110 pm, the radius of the anion is- 144 pm 300 pm 600 pm 400 pm

2.Which of the following is a pseudo solid? CaCl2 Glass NaCl Cu

3.Schottky defect in crystals is observed when: unequal number of cations and anions are missing from the lattice equal number of cations and anions are missing from the lattice an ion leaves its normal site and occupies an interstitial site density of the crystal in increased.

4.A metal oxide crystallise in a hexagonal close packed array of oxide ions with two out of every three octahedral holes occupied by metal ions. The formula of metal oxide is- MO M2O3 M2O MO2

5.Graphite is a good conductor of electricity due to presence of : anions cations lone pair of electrons free valence electrons

6.Potassium has a bcc structure with nearest neighbour distance of 4.52Å. Its atomic weight is 39. Its density will be: 555 kg/m3 804 kg/m3 908 kg/m3 500 kg/m3

7.How many chloride ions are there around Sodium ion in NaCl crystal 4 5 6 8

8.The percentage of empty space in a face centered cubic arrangement is- 32 26 74 68

9.Fe3O4 crystal is- Paramagnetic Ferromagnetic Diamagnetic None of these

10.A metallic element has a cubic lattice. Each edge of the unit cell is 2Å . The density of the metal is 2.5 g /cc. The unit cells in 200 g of the metal are 1x 10 ^ 25 1 x 10 ^ 24 1 x 10 ^ 20 1 x 10 ^ 23

11.Aluminium has fcc structure. The length of the unit cell is 409 pm. If the density of the metal is 2.7 g/cc, the molar mass of Al atom is- 28 g/mol 30 g/mol 26.8 g/mol 25 g/mol

12.Which type of solids have high melting point? Ionic Molecular Covalent Metallic

13.Metal deficiency defects are shown by: alkali metals alkaline metals transition metals non-metals

14.The radius of the sodium ion is 95 pm and that of chloride ion is 181 pm. Predict the co-ordination number of sodium ion- 4 6 8 2

15.One among the following is an example of ferroelectric compound. It is- Quartz Lead Chromate Barium titanate Tourmaline

16.When NaCl crystal is doped with magnesium chloride, the nature of defect produced is- Interstitial defect Schottky defect Frenkel Defect None of these

17.Sodium metal cystallizes in body centred cubic lattice with the cell edge a=4.28 Å. What is the radius of the sodium atom? 1.86Å 6.81Å 8.61 Å 3.65Å

18.Which of the following describes the hexagonal close packed arrangement of spheres? ABCABA ABCABC ABABA ABBABB

19.Which of the following does not represent a type of crystal system- Triclinic Monoclinic Rhombohedral Isotropical

20.For coordination number -4, the limiting radius ratio is- 0.414 0.732 0.225 0.155

Solid State Class 12 MCQ Test

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