most previous year question chemistry class 12 lesson 1 solid state
1. number of Bravia lattice in cubic crystal is
a. 3
b .1
c .4
d.14
ans .A
2. an octahedral void is a surrounded by which of the following numbers of a spheres
a) 4
b) 6
c)8
d)12
ans.6
3. which of the following types of defect causes a decrease in density of a crystal
a) frenkel defect
b) schotakky defect
c) interstitial defect
d) f- centre
ans .B
4. which of the following is a ferromagnetic substance
a) Nacl
b) fe304
c) o2
d) N2
answer .B
5. which of the following is a crystalline solid?
a) diamond
b) glass
c) rubber
d) all of these
ans.A
6. which of the following oxides show ferromagnetism?
a) cro2
b) Mno2
c) fe203
d) v205
ans.A
7. crystals are
a) four types
b) three types
c) seven types
d) all of these
answer.A
8. the structure of a compound made of element a and b is crystalized the atom is situated at the corner and atom b is situated at the centre of each face of the cube what is the formula of this compound?
a) AB3
b) A3B
c) AB
d) AB2
answer .A
9 . in body centre cubic crystal structure so co-ordinate number of atom is
a) 4
b) 8
c) 9
d) 12
answer.8
10 . which of the following is an insulator
a) graphite
b) aluminium
c) diamond
d) silicon
answer.c
11. coordination number of sodium ion inN a + in NaCl is
a) 4
b) 3
c) 6
d) 5
answer.5
12. which one of the following is non crystal line or amorphous
a) diamond
b)cscl
c) glass
d) common salt
answer.c
13. in HCp structure the packing fraction is
a) 0.68
b) 0.74
c)0.54
d)0.50
answer.B
14. the number of basic crystal system is
a) 4 use
b)6
c)7
d) 8
answer.7
15. crystal system maybe which of the following crystal system will have parameter a is not equal to 20 equal to C and Alpha equal to bta equal to gama equal to 90 degree
a) triclinic
b) orthorombic
c) cubic
d) monoclinic
answer. B
16. percentage of free space in BCC unit cell is
a) 32%
b) 34%
c)28%
d)30%
answer.A
17 .In which of the following pairs of structure are tetrahedral as well as octahedral voids respectively ?
a) BCC and FCC
b) HCP and simple cubic
c) HCP and CCp
d) BCC and HCp
ans .C
18. the coordination number of a metal crystalising in hexagonal close packed it HCP structure is
a) 12
b) 8
c) 4
d) 6
answer .A
19. nahin electron occupies the emperor space of negatively charge iron effect in crystal is
A) schotakky defect
b) frenkel defect
c) f centre
d) none of these
और भी ज्यादा जानकारी के लिए हमारे व्हाट्सएप ग्रुप को ज्वॉइन करें।।
20 . which of the following is a network solid?
a) So2
b) I2
c) Daimond
d) H2o
answer.C
21 an example of amorphous solid is
a) Diamond
b) graphite
c) salt
d) rubber
answer .D
22. which of the following oxide behaves as conductor or insulator depending upon temperature?
a) Tio
b) sio2
c) Tio3
d) Mgo
answer .b
23. the lattice site in a pure crystal cannot be occupied by
a) molecules
b) ion
c) electron
d) atom
answer.C
24 . graphite cannot be classified as
a) conducting solid
b) network solid
c) covalent solid
d) ionic solid
answer.D
25 . cation are present in the interetial site in
a) frenkel defect
b) schotakky defect
c) metal excess defect
d) vaccancy defect
answer.A
