Chapter 4 – Multiple Choice Questions

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Multiple Choice Questions

1. The attractive force that holds atoms together is called

(i) Bond strength

(ii) Chemical energy

(iii) Chemical bond

(iv) None of these

 

2. Which electrons take part during a chemical reaction?

(i) Inner electrons

(ii) Outer electrons

(iii) Inner and outer electrons

(iv) None of these

 

3 The type of bond between two atoms is determined by the difference of

(i) Electron affinity values

(ii) Electronegativeity value

(iii) Ionization potential values

(iv) None of these

 

4. A bond which is formed by the complete transfer of one or more electrons from one atom to another is called

(i) Covalent bond

(ii) Ionic bond

(iii) Co-ordinate bond

(iv) H bond

 

5. A chemical bond which is formed by mutual sharing of electrons is called

(i) Ionic bond

(ii) Covalent bond

(iii) Metallic bond

(iv) None of these

6. Ionic compounds have high

(i) high M.P

(ii) high B.P

(iii) high M.P.r. BP.

(iv) None of these

 

7. Ionic compounds are soluble in

(i) benzene

(ii) water

(iii) chloroform

(iv) hexane

 

8. A covalent bond in which both the electrons are donated by one of the atoms is called

(i) ionic bond

(ii) Covalent bond

(iii) Coordinate covalent bond

(iv) None of these

 

9. The bond which acquires a partial ionic character is known as

(i) Covalent bond

(ii) Ionic b0l1d

(iii) Polar Covalent bond

(iv) Non- polar bond

 

10. HCL possess

(i) Polar covalent bond

(ii) Ionic bond

(iii) Coordinate bond

(iv) Non- polar bond

 

11. A bond which is formed by sharing of two, two electron between two atoms is called

(i) Single covalent bond

(ii) Double covalent bond

(iii) Triple covalent bond

(iv) None of these

 

12 Which compound has coordinate covalent bond?

(i) CH4

(ii) NH3

(iii) NH+4

(iv) SiH4

 

13. The double bonds are present between the atoms of the molecule.

(i) CO2

(ii) H2O

(iii) CH3cl

(iv) CH4

 

14. The theory which states that electron pairs are arranged around the central atom of a molecule in such a way that there is maximum separation is

(i) \/ESPR theory

(ii) \/.B theory

(iii) M. O theory

(iv) None of these

 

15. The theory which states that covalent bond is formed by the overlapping of two or more than two half filled atomic orbital is

(i) M.G theory

(ii) V. B theory

(iii) \/ESPER Theory

(iv) None of these

 

16 The degree of polarity of a molecule is expressed in terms of its

(l) Viscosity

(ii) Surface tension

(iii) Dipole moment

(iv) Refraction

 

17 The SI units of dipole moment are

(i) Joule

(ii) Debye

(iii) Joule – meter

(iv) Coulomb meter

 

18. A bond in which region of highest electron density is around the bond axis is called

(i) Pi- bond

(ii) Sigma bond

(iii) H bond

(iv) None of these

 

19. The bond which is formed due to parallel overlap of p- orbital of two already bonded atoms is known as

(i) Pl- bond

(ii) Sigma bond

(iii) Metallic bond

(iv) None of these

 

20. The geometry of NH3 is

(i) Linear

(ii) Octahedral

(iii) Angular

(iv) Pyramidal

21. The mixing of one s and three p- orbital to forms four equivalent hybrids is called

(i) sp² hybridization

(ii) sp hybridization

(iii) sp³ hybridization

(iv) dsp³ hybridization

 

22. Ethylene molecule has which hybridization

(i) Sp³

(ii) SF

(iii) sp²

(iv) None of these

 

23. The bond angle of BCl³ molecule is

(i) 10 º

(ii) 109.5 º

(iii) 107.5 º

(iv) 120 º

 

24. The molecule of ethylene contains how many sigma bonds?

(i) Three

(ii) Two

(iii) One

(iv) Four

 

25. Each SP3 hybird orbit-al has p character

(i) 70%

(ii) 25%

(an) 75%

(iv) 20%

 

26. PH3 has geometry

(i) Tetrahedral

(ii) Pyramidal

(iii) Hexagonal

(iv) Octahedral

 

27. Which of the following is non- polar molecule?

(i) CH4

(ii) H2O

(iii) NH3

(iv) H2S

 

28. Which of the following is polar molecule?

(i) NH3

(ii) CCl4

(iii) C6H6

(iv) C2H4

 

29. Which molecule has liner geometry?

(i) S02

(ii) H2 O

(iii) CO2

(iv) H2 S

 

30. Which molecule has pi- bond ‘?

(i) Cl2

(ii) NH3

(iii) HCL

(iv) O2

 

31. Which molecule has lone pair of electrons?

(i) CCl4

(ii) H2O

(iii) C6H6

(iv) None of these

 

32. Which molecule has zero dipole moment?

(i) S02

(ii) H2O

(iii) NH3

(iv) CO2

 

33. Oxygen atom in H20 shows hybridization?

(i) SP

(ii) SP²

(iii) SP³

(iv) SP²d

 

34. Which set of electrons offers more repulsion?

(i) Lone pair- bond pair

(ii) Bond pair- bond pair

(iii) Lone pair~ lone pair

(iv) None of these

 

35. The geometry of the NH; is no 20 and 35 are same, also 26

(i) Tetrahedral

(ii) Linear

(iii) Pyramidal

(iv) Trigonal

 

36. Which of the following molecules have zero dipole moment?

(i) CCL4

(ii) CH4

(iii) BF 3

(iv) All of the above

 

37. Which of the following molecules has angular shape?

(5) H2S

(ii) CO2

(iii) CO

(iv) HF

 

38. Which compounds have fast reactions?

(i) Covalent compounds

(ii) Ionic compounds

(iii) Metallic compounds

(iv) Coordinate compounds

 

39. The geometry of SF6 molecule is

(i) Tetrahedral

(ii) Octahedral

(iii) Angular

(iv) Square planar

 

40. Elements which have completely filled outermost shell and do not combine with other elements is called 4π 41 are same

(i) Innert element

(ii) Non-element

(iii) Unstable element

(iv) None of these

 

41. Bond formed by complete transference of one or more electrons from one atom to another is called:

(i) Ionic bond

(ii) Covalent bond

(iii) Co-ordinate covalent bond

(iv) None of these

 

42. Bond formed by mutual sharing of electrons between two atoms is called: 5 ,42 are same

(i) Covalent bond

(ii) Ionic bond

(iii) Electrovalent bond

(iv) B and C

 

43. An ion with a single positive charge becomes an atom by:

(i) Losing an electron

(ii) Gaining an electron

(iii) Gaining a proton

(iv) None of these

 

44.Valenceelectrons are the ____ most shell electrons:

(i) Inner

(ii) Outer

(iii) Middle

(iv) None of these

45. Ionic bond forms between:

(i) Non metals

(ii) Metals

(iii) More electropositive and more electro negative elements

(iv) Both elements have equal electro negativity

 

46. Bonding between sodium atom and chlorine atom is

(i) Covalent bonding

(ii) Non- Polar bonding

(iii) Ionic bond

(iv) Hydrogen bonding

 

47. The statement is not correct about Ionic compounds

(i) Ionic compounds have high melting and boiling points

(ii) They conduct electricity in the molten state

(iii) They are solids under ordinary conditions

(iv) They readily dissolve in non- polar solvent

 

48. The most important factor responsible for the formation of an ionic compound is

(i) Ionization potential

(ii) Lattice Energy

(iii) Electron affinity

(iv) Activation Energy

 

49. The mixing of different atomic: orbital is known are:

(i) Crystallization

(ii) Filtration

(iii) Hydrogenation

(iv) Hybridization

 

50. Sp³ orbital are oriented with each other at an angle of

(i) 120°

(ii) 180°

(iii) 109. 5°

(iv) 107. 5°

 

51. Sp³ hybird orbital gives _____ structure:

(i) Triangular

(ii) Planer

(iii) Trigonal

(iv) Tetrahedral

 

52. Which of the following compound is not linear in shapes:

(i) CO

(ii) CO2

(iii) HBrD

(iv) H2O

 

53. sp orbital are oriented with each other at an angle of:

(i) 120°

(ii) 180°

(iii) 109. 5°

(iv) 107. 5°

 

54. In sp Z hybridization carbon has:

(i) Two unhybrid orbitals

(ii) One unhybrid orbital

(iii) Four unhybrid orbitals

(iv) Two hybrid orbitals

 

55. The angle between bonds in an ammonia molecule is

(i) Closer to angle in a liner molecule

(ii) Closer to a tetrahedral angle

(iii) Closer to angle in planar molecule

(iv) Closer to 90°

 

56. The angle between bonds in a water molecule is:

(i) Less than 104°

(ii) More than 104.5°

(iii) 104. 5°

(iv) More than ammonia

 

57. According to electron pair repulsion theory shape of the molecule depend upon:

(i) Bond pairs of electron

(ii) Lone pair of electron

(iii) Both of these

(iv) None of these

 

68. The molecule in which the electron pair on the central atom are directed at 180°

degree angle to each other is

(i) Be F2

(ii) C2 H2

(iii) CH

(iv) C2 H4

 

59. What is the total number of shared pair of electrons is the ethane molecule?

(i) 6

(ii) 8

(iii) 10

(iv) 12

 

60. Bonding molecular orbital forms by:

(i) s- s atomic orbital

(ii) s- px atomic orbital

(iii) Px- px atomic orbital

(iv) All of these

 

61. Which of the following Statements is correct?

(i) The anti- bonding molecular orbital is lower in energy than the atomic orbit

(ii) The anti- bonding molecular orbital is lower in energy than bonding molecular orbital

(iii) The anti- bonding molecular orbital is equal in energy to the atomic orbital

(iv) The anti- bonding molecular orbital is higher in energy than the bonding molecular orbital V.

 

62. Which one orbital is formed by sigma bonding.

(i) Anti – bonding molecular orbital

(ii) Bonding molecular orbital

(iii) Double bonding

(iv) Triple bonding

 

63. All triple bonded compounds must have:

(i) One sigma (6) and two Pi (y) bonds

(ii) Two sigma (6) and two Pi (y) bonds

(iii) All sigma (6) bonds

(iv) All Pi (y) bonds

 

64. Pi bond is:

(i) Stronger than sigma bond

(ii) Weaker than sigma bond

(iii) Same as sigma bond

(iv) None of these

 

65. Nitrogen molecules has:

(i) 1 Pi bond

(ii) 2 Pi bond

(iii) 2 Sigma bond

(iv) 3 sigma bond

 

66. Which has the longest bond is called as:

(i) C = C

(ii) C = C

(iii) C-C

(iv) All of these

 

67. Energy required to break as bond is called as:

(i) Heat of atomization

(ii) Heat of combustion

(iii) Bond energy

(iv) Latent heat of fusion

 

68. Dipole moment is a measure of separation of charges in:

(i) Atoms

(ii) Molecules

(iii) Element

(iv) Metals

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