Chemistry MCQ

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

Right Answer : d

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

Right Answer: d

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

Right Answer: c

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

Right Answer: d

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

Right Answer: d

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

c. CCl4
d. CH3Cl

Right Answer: c

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

Right Answer: b


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

Right Answer: d

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

Right Answer: d

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

Right Answer:  b

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

Right Answer:  c

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

Right Answer:  a

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

Right Answer: d

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

Right Answer: b

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

Right Answer : c

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

Right Answer: a

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

Right Answer: b

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

Right Answer: a

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

Right Answer: c

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

Right Answer:  d

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

Right Answer: b

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

Right Answer: c


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

Right Answer: a

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

Right Answer: b

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

Right Answer :  c

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

Right Answer : c

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

Right Answer: a

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

Right Answer: d

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

Right Answer : b

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

Right Answer: d