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Roy Anthony
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1 Hybridisation 1. Hybridisation 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 % % % % 3. The hybridization 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 2. Co-ordinate covalent bond only 3. Pi-bond only 4. Either 1 or 2

2 8. Decreasing order of size of various hybrid orbitals is: 1) 2 3 sp > sp > sp 2) 3 2 sp > sp > sp 3) 9.The molecule which contains 3 3and 3 sp sp sp p 2 3 sp > sp > sp 4) sp= sp2 = sp3 bonds in it is 1. CH3CH3 2. CH3CHO 3. CH3CH2OH 4. CHCl3 10. The type of hybrid orbitals used by the oxygen atom in Cl2O molecule is 1. sp3 2. sp2 3. sp 4. dsp2 11. Bond angle between two hybrid orbitals is 180o, s - orbital character of hybrid orbital is nearly 1.25 % % % % 12. Hybridisation 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 1. sp 2. sp3 3. sp2 4. None 14. In which of the following species the underlined carbon having sp3- hybridisation? CH 1) 3 -COOH CH CH OH 2) 3 2 CH COCH 3) 3 3 CH = CH -CH 4) The ratio of pure orbitals to hybridized orbitals in ethylene is 1) 2: 3 2) 3: 1 3) 1: 1 4) 1: Which one of the following is a correct set? 1. H2O, sp3 angular 2. H2O, sp3 linear 3. NH 4, dsp 2, square planar 4. CH4, d sp2 tetrahedral

3 17. What is the hybridisation state of the central atom in the conjugate base of NH4 + ion? 1. sp 2.sp3 3.sp2 4. d sp2 CH NH is 18. The hybridisation of N in sp 2. sp2 3. sp3 4. d sp2 19. The shape of CH4; SO4-2 ; PO 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 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. s-s 2. p - p 3. sp3-s 4. sp2-p sp s Bond is present in 1. CH4 2. NH3 3. CCl4 4. CH2 = CHCl

4 26. Molecule 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 28. Molecule 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 XeF 4 is 1) sp 3 d 2, 90 2) dsp 2, 90 3) sp ) sp 3 d, Number of hybrid orbitals present in a molecule of propene is The number of hybrid orbitals in a molecule of Ethyne is The hybridisation of carbon in diamond, graphite and acetylene are 1. sp3,sp,sp2 2. sp,sp2,sp3 3. sp3,sp2,sp 4. sp2,sp3,sp 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

5 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. Hybridisation noticed in CO2 and CO is 1. sp3 2. dsp2 3. sp 4. sp2 37. The compound in which carbon uses sp3 hybridisation for bond formation 1. H-COOH 2. (NH2)2C=O 3. H-CHO 4. CH3CH2 OH 38. The total number of sp2 hybrid orbitals used in bonding of ethylene molecule is C ( CN) are : in 39. Carbon atoms 2 4 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 C-C bond length increases from1.34 A0 to 1.54A0 4. All of these.

6 41. For which hybridization, there are two unequal bond angles 1. sp3 2. sp2 3. sp 4. sp3d 42. Bond angle in 1) 180 2) 120 3) 109 4) The hybrid orbital having an equal amount of s and p - characters is 1. sp 2. sp3 3. sp2 4. sp3d 44. On hybridisation of one s and one p orbitals we get 1. Two mutually perpendicular orbitals 2. Two orbitals at 180o 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 6) 3 7) 1 8) 2 9) 3 10) 1 11) 4 12) 3 13) 1 14) 2 15) 3 16) 1 17) 2 18) 3 19) 3 20) 1 21) 1 22) 2 23) 4 24) 3 25) 4 26) 3 27) 2 28) 2 29) 1 30) 2 31) 2 32) 3 33) 3 34) 1 35) 2 36) 3 37) 4 38) 2 39)3 40)4 41) 4 42) 3 43) 1 44) 2 45) 2

Chemical Bonds, Orbital Shapes, and Orbital Hybridization

Chemical Bonds, Orbital Shapes, and Orbital Hybridization PRELAB ASSIGNMENT Read the entire laboratory write up. Write an objective and answer the following questions in your laboratory notebook before