2012-05-31

Chemistry MCQs Chemical Bonding 1st year


Chemistry Chapter 6 Topic Chemical Bonding :

1. Which one of the following compounds does not obey Octet rule
a. PF3
b. BF3
c. NF3
d. AsF3

2. Maximum energy is required to remove an electron from
a. s-orbital
b. p-orbitals
c.d-orbitals

d. f-orbitals

3. Among halogens, maximun electron affinity is shown by----
a. Iodine
b. Bromine
c. Chlorine
d. Flourine

4. Bonding maybe 100% ionic when electro-negativity difference is----
a. 0.9
b.1.7
c. 2.4
d. 3.4

5. Ionic bonding is usually formed between the elements of -------- of periodic table
a. Group I and group VII
b. GroupII    and group VII
c. Group I and group VI
d. All of above

6. Which one of the following is a non-polar copmpound.
a. CHCl3
b. CH3OH

c. CCl4
d. CH3Cl

7. How many C0-Ordinate bonds are present in HCLO4.
a. 4
b. 3
c.2
d.1

8. Valence shell electron pair repulsion theory was developed by------
a. Gillespie
b. Sidgwick
c. Powell
d.All of above

9. Which molecule has a non-linear shape.
a. MgCl2
b. CdCl2
c. SrCl2
d. SnCl2

10. According to VSPER theory ,ammonia molecule has------shape
a. Tetrahedral
b.Trigonal
c. Pyramidal
d. Triangular

11. In fluorine molecule, single covalent bond is formed by the ------
a.S-S overlap
b. p-p direct overlap
c. S-p overlap
d. p-p sideways overlapping

12. Ethyne molecule has-----sigma bonds
a. 1
b.2
c.3
d.4

13. Energies of molecular orbitals are determined by ---------measurements
a. Spectroscopic
b. Kinetic
c.Thermal
d.Thermodynamics

14. Bond order of Oxygen in O2+2  ion is-----
a. 1
b.2
c.two and half
d. 3

15. Carbon atom of Carbonyl group in ACETONE has-------hybridization
a. sp3
b. sp2
c..sp
d. None of above.

16. Which one of the following molecules has the highest dipole moment.
a. H2S
b. SO2
c.H2O
d. NO2

17. Covalent bond maybe regarded as-----
a. Rigid and directional
b. Rigid and non-directional
c. Non-rigid and directional
d. Non-rigid and non-directional

18. During the formation of chemical bond , energy of the system-----
a. Increases
b.Decreases
c.Remains constant
d.Does not change

19. Size of an atom is expressed in terms of--------
a. Atomic radius
b.Covalent radius
c. Vander waal's radius
d. All of above

20. The bond angles in NH3 and NF3 mlecules have relationship
a.Same angles
b. NH3 has less angle
c.  NF3  has less angle
d. None of above

21. The bonding present in ammonium chloride is---------
a. Covalent
b.Ionic
c. C0-ordinate
d. All of above

22. The S.I unit of dipole moment is-------
a.Faraday
b.Metre coulomb
c.Debeye
d.none

23. The orbit having lowest energy is----
a. Atomic orbital
b.Hybrid orbital
c. Bonding molecular orbital
d. Anti bonding molecular orbital

24. The species having small size is
a. Fe2+
b. Fe1+
c. Fe
d. Fe1-

25. Which one of the following species may have 100%ionic bonding
a. CsF
b. NaCl
c.KBr
d. None of above

26. All the atoms are coplanar in the molecule----------
a. CH4
b. BF3
c. PH3
D. NH3

27. Maximum paramagnetic behavior is shown by the species-----
a. O2+1
b. O2+2
c. O2
D. O2-2

28. Carbon atoms in propene molecule are-----------hybridized
a. sp2
b. sp3
c. Both
d. None

29. Electro-negativity values are usually expressed in the unit------
a. No unit
b. Kilo-calorie
c.Kilo Joule
d. Kilo-calorie per mole

30. Ionic bond formation in sodium chloride is mainly due to----------
a. Ionization energy of sodium
b. Electron affinity of Chlorine
c. Lattice energy of sodium chloride
d. All of above

31. The formation of Co -ordinate complex compound by transition elements can be explained on the basis of ------------theory
a. Valence bond
b. Ligand field
c. Molecule orbital
d. VSPER

32. Bonding in phosphonium ion is ----- percent covalent
a. 25
b. 33
c.50
d.75


1 comment:

  1. give the key plzzzzzzzzz

    ReplyDelete

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