THE SOLID STATE (ठोस अवस्था ) 

¤ Solid State Chemistry Most VVI Objective Question || ठोस अवस्था महत्वपूर्ण ऑब्जेक्टिव प्रशन || बोर्ड परीक्षाओ में बार बार पूछे  जाने वाले प्रशन 

Solid State Objective Question for 12th Board Exam || Solid State Class Notes Objective

1. The material used in the solar cells contains

(A) Cs

(B) Si

(C) Sn 

(D) Ti

2. How many kinds of space lattices are possible in a crystal? 

(A) 23 

(B) 7

(C) 230 

(D) 14 

3. The co-ordination number of a metal crystallizing in a hexagonal close packed structure is

(A) 12

(B) 4

(C) 8 

(D) 6 

4. The number of octahedral sites per sphere in fcc structure is 

(A) 8 

(C) 2 

(B) 4

(D) 1

5. The packing fraction for a body-centred cube is 

(A) 0.42 

(B) 0.53

(C) 0.68 

(D) 0.82 

 6. A semiconductor of Ge can be made p-type by adding 

(A) trivalent impority

(B) tetravalent impurity 

(C) pentavalent impurity

(D) divalent impurity

7. Percentage of free space in bcc unit cell is 

(A) 32% 

(B) 34%

(C) 28% 

(D) 30% 

8. Which among the following is amorphous solid? 

(A) Graphite (C)

(B) Quartz Glass (SiO₂)

 (C) Chrome Alum

(D) Silicon Carbide (SiC) 

9. The number of octahedral voids per atom in a crystal lattice is

(A) 1 

(B) 2

(C) 4 

(D) 8

10. Which is a ferroclectric compound? 

(A) BaTiO₃

(B) K₄[Fe(CN)₆] 

(C) Pb₂O₃ 

(D) none of these

11. The number of atoms per unit cell of bcc structure is 

(A) 1

(B) 2

(C) 4 

(D) 6 

12. Solids which do not show the same physical properties in different directions are called

(A) Pseudo solids

(B) Isotropic solids 

(C) Polymorphic solid

(D) Anisotropic solids

 13. The number of basic crystal system is 

(A) 4 

(B) 6

 (C) 7 

(D) 8 

⇒ SOLID STATE OBJECTIVE QUESTION HINDI MEDIUM

14. Which has hcp crystal structure?

(A) NaCl 

(B) CsCI

(C) Zn 

(D) RbCI

15. The appearance of colour in solid alkali metal halides is generally due to

 (A) interstitial positions

(B) F-centres

(C) Schottky defect

(D) Frenkel defect

16. The number of carbon atoms in the unit cell of diamond is 

(A) 6 

(B) 1

(C) 4

(D) 8 

17. Pure silicon is

(A) conductor 

(B) insulators

(C) semiconductor

(D) none of these

18. The structure of MgO is similar to NaCl. The co-ordination number of Mg is 

(A) 2

(B) 6

(C) 4 

(D) 8 

19. Which among the following is ferromagnetic? 

(A) Ni 

(B) CO

(C) CrO₃

(D) All 

20. The highest Ferromagnetism is found in 

(A) Fe 

(B) Ni

(C) CO

(D) none of these

21. The co-ordination number of sodium in sodium oxide (Na₂O) is 

(A) 6 

(B) 4

(C) 8 

(D) 2 

22. The structure of sodiumchloride is 

(A) Body centred cubic

(B) face centred cubic 

(C) square planer

(D) none of these

23. Fe₃O₄ solid is

(A) Paramagnetic

(B) Diamagnetic

(C) Ferrimagnetic

(D) none 

24. In NaCl, the chloride ions occupy the space in a 

(A) fcc 

(B) bcc

(C) both 

(D) none 

25. Superconductors are derived from the compounds of 

(A) p-block elements

(B) transition elements 

(C) actinides

(D) lanthanides

26. Graphite is

(A) Molecular solid  

(B) Covalent solid 

(C) Ionic solid 

(D) Metallic solid

 27. In which unit cell the number of atoms is maximum? 

(A) bcc

(B) hcp

(C) fcc

(D) cubic 

28. Frenkel and schottky defects both are in 

(A) NaCl 

(B) AgCl

(C) AgBr

(D) KCI 

29. The good conductor of heat and electricity is

(A) Anthracite coke

(B) Diamond

(C) Graphite 

(D) Charcoal

30. Covalent solid is

(A) Rock salt 

(B) ice

(C) Quartz 

(D) dry ice 

31. Iodine is 

(A) Ionic solid

 (B) Atomic solid

(C) molecular solid

(D) covalent solid

32. Which of the following has Frenkel defect?

(A) sodium chloride

(B) graphite 

(C) silver bromide

 (D) diamond

33. Avogadro’s number (N) is equal to

(A) 6.023 x 10²⁴

(B) 6.023 x 10²³

(C) 6.023 x 10^-23

(D) 11.2

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