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HYBRIDISATION
1. Hybridization involves
1. Inter mixing of electron s
2. Inter mixing and redistribution of atomic orbitals of only one atom
3. Inter mixing and redistribution of atomic orbitals
of different atoms
4. All of these
2.The s - character in the hybrid orbital of the central atom present in SF6 molecule is
1. 25 %
2. 75 %
3. 40 %
4. 16.66 %
3.The hybridisation of Nitrogen in Nitrite ion is
1. sp
2. sp2
3. sp3
4. sp3d
4. Hybridisation of iodine in IF7 molecule is
1. sp3d3
2. sp3d
3. sp3d2
4. dsp2
5.The molecule which contains sp3d2 and p orbitals overlapping in it is
1. PCl5
2. BrF5
3. ClF3
4. IF7
6. Sp3d hybridisation is not present in
1. PCl5
2. ClF3
3.SeF6
4.XeF2
7.Linear combination of two hybridised orbitals belonging to two atoms and each having one electron
leads to a
1. Sigma bond only
3. Pi-bond only
2. Co-ordinate covalent bond only
4.either 1 or 2
8.Decreasing order of size of various hybrid orbitals is :
2
3
1) sp > sp > sp
3
2
2) sp > sp > sp
2
3
3) sp > sp > sp
4) sp= sp2 = sp3
9.The molecule which contains σ sp3 − sp3 andσ sp3 − p bonds in it is
1. CH3CH3
2. CH3CHO
3. CH3CH2OH
4. CHCl3
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10. The type of hybrid orbitals used by the oxygen atom in Cl2O molecule is
1. sp3
2. sp2
4. dsp2
3. sp
11. Bond angle between two hybrid orbitals is 180o, s - orbital character of hybrid orbital is nearly
1.25 %
2.33.33%
3. 16.6 %
4. 50 %
12. Hybridization of oxygen in hydronium ion is
1. sp
2.sp2
3.sp3
4. d sp2
13. The type of hybridisation exhibited by carbon in C3O2 [O=C=C=C=O] is
2. sp3 3. sp2 4. None
1. sp
14. In which of the following species the underlined carbon having sp3- hybridisation?
1) CH 3 − COOH
2) CH 3 CH 2OH
3) CH 3 COCH 3 4) CH 2 = CH − CH 3
15. The ratio of pure orbitals to hybridized orbitals in ethylene is
1) 2: 3
2) 3: 1
3) 1: 1
4) 1: 3
16. Which one of the following is a correct set?
1. H2O, sp3 angular
+
2. H2O, sp3 linear
4. CH4, d sp2 tetrahedral
2
3. NH 4 , dsp , square planar
17. What is the hybridisation state of the central atom in the conjugate base of NH4+ ion?
2.sp3
1. sp
3.sp2
4. d sp2
18. The hybridisation of N in CH 3 NH 2 is
1. sp
2. sp2
3. sp3
4. d sp2
19. The shape of CH4; SO4-2; PO4-3
1. Trigonal planar
3. Angular
3. Tetrahedral
4. Trigonal Bipyramidal
20. sp3 hybrid orbital has
1. 1/4 th s - character
2. 1/2 th s - character
3. 2/3 th s – character
4. 3/4 th s - character
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21.Which of the following is the most efficient overlapping?
1. sp3-sp3
2. sp-sp
3. sp3-sp2
4. All
22. The hybridisation of carbon in carbon dioxide molecule is
1. sp2
2. sp
3. sp3
4. None
23. The hybridisation of central atom is sp3d2 in
1. PCl5
2.BrF3
3. XeF2
4. BrF5
24. N-H Bond in Ammonia molecule is
1. σ s-s
25
2. σ p - p
σ sp
2
1. CH4
4. σ sp2-p
3. σ sp3-s
bond is present in
−s
2. NH3
3. CCl4
4. CH2 = CHCl
26Molecule which contains 4 bonded pairs and 2 lone pairs of electrons on the central atom is
1. XeF2
2. CO2
3. XeF4 4. SF6
27. In which of the following molecule, the central atom undergoes sp3d hybridisation with three lone
pairs of electrons
1. Ammonia 2. Xenon difluoride
3. Chlorine trifluoride
4. Hydrogen sulphide
28Molecule having maximum number of lone pairs of electrons on central atom is
1. PH3
2. H2S
3. CH4
4. BrF5
29. Hybridisation and bond angle in XeF4 is
1) SP3d2, 90°
2) dsp2, 90°
3) Sp3 109° 4) Sp3d, 120°
30. Number of hybrid orbitals present in a molecule of propene is
1. 12
2. 10
3. 9
4. 8
31. The number of hybrid orbitals in a molecule of Ethyne is
1. 6
2. 4
3. 8
4. 2
32. The hybridisation of carbon in diamond, graphite and acetylene are
1. sp3,sp,sp2
2. sp,sp2,sp3
3. sp3,sp2,sp
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4. sp2,sp3,sp
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33. The structural formula of a compound is CH3 - CH = C= CH2. The types of hybridisation at the four
carbons from left to right are.
1. sp3,sp,sp2,sp3
2. sp2,sp3,sp2,sp 3. sp3,sp2,sp,sp2
4. sp3,sp2,sp2,sp2
34.As the s - character in a hybrid orbital increases, the bond angle
1. Increases
2. Decreases
3. Remains same
4. Becomes zero
35. A molecule contains two sigma bonds, two Pi bonds and one lone pair of elecrons in the valence
shell of X. The shape of molecule is
1) Linear
2) Angular
3) Tetrahedral
4) Pyramidal
36. Hybridization noticed in CO2 and CO is
1. sp3
2. dsp2
4. sp2
3. sp
37. The compound in which carbon uses sp3 hybridisation for bond formation
1. H-COOH
2.(NH2)2C=O
3. H-CHO
38. The total number of sp2 hybrid orbitals used in
1. 5
2. 6
3. 7
4. CH3CH2 OH
bonding of ethylene molecule is
4. 8
39. Carbon atoms C2 (CN ) 4 are : in
1) sp hybridized 2) sp2 hybridized 3) sp and sp2 hybridized 4) sp, and sp3 hybridized
40. On catalytic hydrogenation, ethylene gives ethane during this reaction
1. Hybridization of carbon atoms changes from sp2 to sp3
2. Bond angle decreases from1200 to 109.50
3. C-C bond length increases from1.34 A0 to 1.54A0
41. For which hybridization, there are two unequal
1. sp3
2. sp2
3. sp
2) 120°
3) 109° 4) 90°
4. All of these.
bond angles
4. sp3d
42. Bond angle in
1) 180°
43. The hybrid orbital having an equal amount of s and p - characters is
1. sp
2. sp3
3. sp2
4. sp3d
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44. On hybridisation of one‘s’ and one ‘p’ orbitals we get
2. Two orbitals at 180o
1. Two mutually perpendicular orbitals
3. Four orbitals directed tetrahedrally
4. Three orbitals in a plane
45. Hybridisation in SO2 molecule is
1. sp
2. sp2
3. sp3
4. sp3d
KEY
1) 2
2) 4
3) 2
4) 1
5) 2
11) 4
12) 3
13) 1 14) 2
15) 3
21) 1
31) 2
22) 2
32) 3
23) 4
24) 3
33) 3 34) 1
41) 4
42) 3
6) 3 7) 1
8) 2
9) 3
10) 1
16) 1
17) 2 18) 3 19) 3
20) 1
25) 4 26) 3
27) 2 28) 2 29) 1
30) 2
35) 2 36) 3 37) 4 38) 2 39)3
43) 1
44) 2
45) 2
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40)4