IIT JEE MCQ Quiz Hub

1. The bond angle in ammonia is
106 degree
107 degree
110 degree
99 degree

2. The increase in bond order results in
increase in bond length and bond energy
decrease in bond length and bond energy both
decrease in bond length and increase in bond energy
none of the above

3. In which of the followingmolecules carbon is not sp3 hybridized?
Benzaldehyde
Cyclohexane
Phenol
Benzyl chloride

4. Hydrogen chloride gas has
hydrogen bond
ionic bond
covalent bond
double bond

5. Ethyl alcohol and methoxy methane are isomeric but ethyl alcohol has higher boiling point because
alcohol has hydrogen bonding
alcohol is soluble in water
ether is more volatile
ether is denser than alcohol

6. Strongest bond is formed by the overlap of
s-s orbitals
ps orbitals
p-p orbitals
s and p orbitals

7. In which of the following octet rule is not applicable?
Alkali earth metal
Alkaline earth metal
Transition elements
p-block

8. Water has high boiling point because it
is ionic
is covalent
has high dielectric constant
is having hydrogen bonding

9. Which of the following is most volatile?
HF
HCI
HI
HBr

10. Which of the following is the weakest bond?
Metallic
Covalent
Ionic
H

11. Covalent character of an ionic compound increases with
decrease in anion size
decrease in cation size
increase in cation size
decrease in both cation and anion size

12. Which of the following has maximum ionic character?
LiCl
CuCl
NaCl
CsCl

13. Higher the bond order greater is
bond energy
bond angle
bond length
paramagnetism

14. Oxygen-oxygen bond length in ozone is same because of
hyper conjugation
resonance
covalent and ionic bond
refraction

15. Ionic solids are characterised by
good conductivity in solid state
solubility in polar solvent
high vapour pressure
low melting point

16. From the following molecules one that contains both ionic and covalent bonds is/are
chlorobenzene
sodium chloride
sodium hydroxide
Water

17. Which of the following is a triatomic molecule?
Ammonia
Phosphine
Sulphuric anhydride
Sulphurous anhydride

18. The hydrogen halide which has maximum boiling point is
HI
HBr
HF
HCl

19. Ammonia molecule is
triangular bipyramidal
octahedral
tetrahedral
pyramidal

20. The bond angle in water is
104.5 degree
94 degree
103 degree
99 degree

21. The number of electrons that are shared between two atoms having a triple bond are
7
6
5
3

22. With the rise of temperature conductivity of metals
increases
decreases
may increase or decrease
remains constant

23. Silicon dioxide has higher boiling point as compared to carbon dioxide because
silicon dioxide is ionic
silicon dioxide is octahedral
silicon dioxide is a covalent solid
silicon dioxide is more polar

24. Shape of the molecule is decided by
both sigma and pi bonds
neither sigma nor pi bonds
pi bonds
sigma bonds

25. Resonance is not shown by
carbon dioxide molecule
silicon dioxide molecule
carbonate ion
benzene

26. Variable valency is shown by
N
Na
F
O

27. Amongst HX, the maximum dipole moment is of
HBr
HCl
HF
HI

28. Maximum covalency of an atom of an element is equal to the
no. of unpaired electrons in the p orbitals
total no. of electrons in the s and p orbitals
total no. of electrons in the p-orbitals
none of the above

29. An ionic bond is formed when one of the atoms
has low ionisation energy
has low ionisation energy and other has high electron affinity
has high ionisation energy and other has low electron affinity
has high electron affinity

30. Tetracovalency of carbon can be explained on the basis of
electronegativity
promotion rule
hybridization
resonance

31. Which among the following is not the characteristic property of carbon?
Availability of d-electron for bonding
Highest electronegativity in the group
Multiple bond formation
Resonance

32. The number of the unpaired electrons in O-2 ion are
0
4
2
1

33. Which of the following bond is the most covalent?
Si-H
P-H
N-H
none of the above

34. Nitrogen atom has atomic no. 7 while oxygen atom 8. The total number of electrons in nitrate ion is:
18
28
32
16

35. Maximum number of bonds between two atoms of a covalent bond can be
four
five
three
zero

36. Diamond is not conducting electrically because
there are only carbon atoms present
it is of crystalline nature
its structure is very compact
no free electrons are presen

37. Metallic sodium is
conductor of electricity
insulator
semi-conductor
none of these

38. Which of the following bond is the most polar?
O-O
C-F
N-F
Cl-Cl

39. A metallic bond is
electrostatic
covalent
polar
non polar covalent bond

40. A molecule which contains unpaired electron is
carbon monoxide
oxygen molecule
molecular nitrogen
carbon dioxide

41. Which concept explains the fact that ortho nitro-phenol is more volatile than p-nitrophenol?
Hydrogen bonding
Hyper conjugation
Covalent bonding
Resonance

42. Electonegativity values of elements help in predicting
polarity of molecules
covalency of the elements
size of the atoms
bond length

43. Which out of the following has highest boiling point?
HCl
HBr
HF
HI

44. Out of the following the weakest interact are involved in
Van der Waals interaction
ionic bond
polar covalent bond
hydrogen bond

45. Ionic bond formation is favoured by
larage cation and large anion
small cation and small anion
small cation
small anion

46. The bond formation in atoms is due to the fact that they
get their energy lowered
acquire higher energy state
change their position
none of the above

47. The nature of bonding in BF3.NH3 is
ionic
co-ordinate
covalent
metallic

48. Formation of ionic compounds is favoured by
low charge on cation and anion
low electron affinity of anion
high ionisation energy of cation
high lattice energy

49. The element with atomic no. 9 can exhibit an oxidation state of
1
2
5
-1

50. Which among the following elements has tendency to form covalent compounds?
Aluminium
Strontium
Beryllium
Calcium