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Chapter No.4 - Chemical Bonding
MCQs And Fill In The Blanks
Text Book Exercise
SECTION- A: MULTIPLE CHOICE QUESTIONS
Tick Mark (✓) the correct answer
1. An example of ionic compound is:
(a)H2
(b)CH4
(c) N2
(d)NaCl ✓
2. Interaction between highly electron deficient hydrogen and highly electronegative atom is called:
(a) covalent bond
(b) ionic bond
(c) hydrogen bond ✓
(d) metallic bond
3. Two fluorine atoms share one electron each in their outermost shell to achieve electronic configuration of:
(a) Xe
(b) Ar
(c) Kr
(d) Ne ✓
4. Number of electrons lost by atoms of group IIIA equals:
(a) 1
(b) 2
(c) 3 ✓
(d) 4
5. Atom which loses two electrons from its outer shell to form ion is called:
(a) oxygen
(b) potassium
(c) magnesium ✓
(d) carbon
6. In NaCl crystal lattice each Na+ ion is surrounded by:
(a) 6 Cl- ions ✓
(b) 6 Na+ ions
(c) 8 Cl- ions
(d) 12 Cl- ions
7. At room temperature most of ionic compounds are:
(a) amorphous solids
(b) crystalline solids ✓
(c) liquids
(d) gases
8. Tendency of atoms to acquire eight electrons in their valence shell is:
(a) octet rule ✓
(b) duplet rule
(c) triplet rule
(d) none of above
9. When one atom forms cation by losing electron and other forms anion by accepting that electron then bond form between them is:
(a) Covalent bond
(b) Ionic bond ✓
(c) coordinate covalent bond
(d) hydrogen bond
10. Noble gases are stable because they contain:
(a) 4 electrons in valence shell
(b) 6 electrons in valence shell
(c) 8 electrons in valence shell ✓
(d) 10 electrons in valence shell
11. Bond which involve 3 shared electron pairs is a:
(a) double covalent bond
(b) single covalent bond
(b) triple covalent bond ✓
(d) none of above
12. A non-metal atom form anion by:
(a) loses of electrons
(b) gain of electrons ✓
(c) loses of protons
(d) gain of protons
13. When two identical atoms share electron pairs and exert force on each other than bond form is:
(a) non-polar covalent bond ✓
(b) polar covalent bond
(c) double covalent bond
(d) coordinate covalent bond
14. Synthetic resins are used on places where:
(a) electric resistance is required
(b) water resistance is required ✓
(c) adhesion is required
(d) friction is required
15. Oxygen belongs to group VIA so number of electrons in its valence shell are:
(a) 3
(b) 4
(c) 5
(d) 6 ✓
16. Electron pairs which are not shared by atoms are called:
(a) electron pairs
(b) lone pairs ✓
(c) bond pairs
(d) shared pairs
17. Strength of intermolecular forces from ionic to covalent bond is:
(a) Weaker ✓
(b) stronger
(c) equal
(d) none of above
18. Ionic crystals have:
(a) high melting points✓
(b) moderate melting points
(c) low melting points
(d) none of above
19. Bond formed by mutual sharing of electron is:
(a) ionic bond
(b) coordinate covalent bond
(c) covalent bond ✓
(d) metallic bond
20. Which of the following diagram shows atoms are bonded with same electronegativity?
(a) A -----:----- B ✓
(b) A ----------: B
(c) A :---------- B
(d) A --:-------- B
21. The attractive force which binds atoms together is called:
(a) a chemical bond
(b) chemical forces
(c) Both 'a' & 'b' ✓
(d) None of above
22. Helium, neon, argon, xenon and krypton present in the atmosphere consist of:
(a) un-bounded atoms ✓
(b) bounded atoms
(c) ionic bonds
(d) covalent bonds
23. Electronic configuration of noble gases is:
(a) ns2 np4
(b) ns2 np5
(c) ns2 np6 ✓
(d) ns2 np8
24. Which one is not a noble gas?
(a) Helium
(b) Argon
(c) Radon
(d) Oxygen ✓
25. Noble gases are sometimes called the:
(a) slow gases
(b) inactive gases
(c) inert gases ✓
(d) idle gases
26. The outermost shell of the noble gases is:
(a) completely filled ✓
(b) half-filled
(c) partially filled
(d) None of these
27. All noble gases contain 8 electrons in the valence shell except:
(a) neon
(b) krypton
(c) xenon
(d) helium ✓
28. Because of these electronic configurations of noble gases are:
(a) stable and active
(b) stable and not active ✓
(c) unstable and active
(d) unstable and not active
29. Atoms to acquire two electrons in the valence shell is called:
(a) duplet rule ✓
(b) triplet rule
(c) octet rule
(d) divalent rule
30. In 1916 this chemist proposed the octet rule.
(a) John Dalton
(b) Chadwick
(c) G.N. Lewis ✓
(d) Goldstein
31. It plays an important role in determining the chemical properties of the atom, including its ability to form chemical bonds.
(a) number of protons
(b) number of neutrons
(c) electrons present in the innermost shell
(d) electrons present in the outermost shell ✓
32. These electrons in the outermost shell of an atom are called:
(a) valence electrons
(b) outer electrons
(c) Both 'a' & 'b' ✓
(d) None of them
33. Electronic configuration of an element is 1s2, 2s2 2p1, therefore the valence electrons this element has are:
(a) one
(b) two
(c) three ✓
(d) five
34. The valence electrons which are involved in chemical bonding are termed as:
(a) valence electrons
(b) bonding electrons ✓
(c) reactive electrons
(d) ionic electrons
35. The group number in the periodic table indicates the:
(a) number of valence electrons in an atom ✓
(b) total number of electrons in an atom
(c) number of protons in the nucleus
(d) number of neutrons in the nucleus
36. Sodium contains one electron in its valence shell so it belongs to:
(a) group I ✓
(b) group II
(c) group III
(d) zero group
37. Phosphorus belongs to group VA, so in the valence shell, it contains:
(a) one electron
(b) two electrons
(c) three electrons
(d) five electrons ✓
38. Chemical bonding is the combining of atoms to form:
(a) new elements
(b) new atoms
(c) new substances ✓
(d) All of these
39. An interaction that holds two atoms together is called a:
(a) chemical bond ✓
(b) ionic bond
(c) covalent bond
(d) coordinate bond
40. In the formation of an ionic bond, an atom loses electrons and changes into:
(a) negative ion
(b) positive ion ✓
(c) neutral atom
(d) None of these
41. The atom which gains electron changes into:
(a) negative ion ✓
(b) positive ion
(c) neutral atom
(d) None of these
42. The electrostatic force of attraction that holds the oppositely charged ions together is called:
(a) chemical bond
(b) ionic bond ✓
(c) covalent bond
(d) coordinate bond
43. Electrovalent bond is also known as:
(a) chemical bond
(b) ionic bond ✓
(c) covalent bond
(d) coordinate bond
44. Generally, an ionic bond is formed between the atoms of:
(a) two same metals
(b) two different metals
(c) two same groups
(d) two different groups ✓
45. Sodium chloride, potassium chloride, magnesium fluoride are:
(a) coordinate compounds
(b) covalent compounds
(c) ionic compounds ✓
(d) None of these
46. The electron arrangement of sodium atom is:
(a) 2, 8, 0
(b) 2, 8, 1 ✓
(c) 2, 8, 2
(d) 2, 8, 3
47. The electron arrangement of chlorine atom is:
(a) 2, 8, 1
(b) 2, 8, 3
(c) 2, 8, 5
(d) 2, 8, 7 ✓
48. The formula of magnesium oxide is:
(a) MgO ✓
(b) MgO2
(c) MgO3
(d) Mg2O
49. The ionic bond between magnesium and oxygen is stronger than the ionic bond between sodium and chlorine because of the:
(a) larger size of the atoms
(b) larger size of cation
(c) greater charge density on the ions ✓
(d) None of these
50. A covalent bond between two atoms, is formed by the:
(a) electrostatic force between two ions
(b) mutual sharing of electrons ✓
(c) only one of the atoms contributes both electrons constituting the bond
(d) None of these
51. The bond in MgO is:
(a) electrovalent bond ✓
(b) covalent bond
(c) co-ordinate bond
(d) chemical bond
52. The electrons of atoms that pair up to form a chemical bond are called:
(a) pair electrons
(b) ionic pair electrons
(c) covalent pair electrons
(d) bond pair electrons ✓
53. The formations of H2, HCl, CH4 are few examples of this type of bonding.
(a) Electrovalent bond
(b) Single covalent bond ✓
(c) Double covalent bond
(d) Triple covalent bond
54. Oxygen (O2) and ethene (C2H4) are examples of this type of bonding.
(a) Electrovalent bond
(b) Single covalent bond
(c) Double covalent bond ✓
(d) Triple covalent bond
55. It has 6 valence electrons in its outer shell.
(a) carbon
(b) chlorine
(c) sodium
(d) oxygen ✓
56. Nitrogen (N2) and ethyne (C2H2) are examples of this type of bonding.
(a) Electrovalent bond
(b) Single covalent bond
(c) Double covalent bond
(d) Triple covalent bond ✓
57. In its outer shells, each nitrogen atom has:
(a) one electrons
(b) two electrons
(c) three electrons
(d) five electrons ✓
58. The covalent bond formed between identical atoms is called:
(a) non-polar covalent bond ✓
(b) polar covalent bond
(c) coordinate covalent bond
(d) dative covalent bond
59. The bond in a hydrogen molecule is:
(a) non-polar covalent bond ✓
(b) polar covalent bond
(c) coordinate covalent bond
(d) dative covalent bond
60. Non-polar covalent bonds are formed when the electronegativities of the two atoms are:
(a) unequal
(b) equal ✓
(c) zero
(d) larger
61. Bonds in HCl, H2O, NH3 are:
(a) non-polar covalent bond
(b) polar covalent bond ✓
(c) coordinate covalent bond
(d) dative covalent bond
62. When the difference between electronegative values of two bonded atoms is more than 1.7, the bond will be purely:
(a) polar covalent
(b) non-polar covalent
(c) ionic or electrovalent ✓
(d) covalent
63. When the difference between electronegative values of two bonded atoms is less than 1.7, the bond will be:
(a) polar covalent
(b) non-polar covalent
(c) ionic or electrovalent
(d) covalent ✓
64. The bond will be pure covalent or nonpolar if the electronegativity difference of bonded atoms is:
(a) zero ✓
(b) 1.7
(c) less than 1.7
(d) more than 1.7
65. The type of bond in which bond pair of electrons is contributed by one atom only, is called a:
(a) coordinate covalent
(b) dative covalent bond
(c) Both 'a' & 'b' ✓
(d) None of these
66. The reaction between ammonia and hydrogen chloride involves the formation of a / an:
(a) ionic bond
(b) covalent bond
(c) polar covalent bond
(d) dative bond ✓
67. Most ionic compounds form:
(a) liquids
(b) crystals ✓
(c) gases
(d) metals
68. The melting and boiling points of ionic compounds are:
(a) high ✓
(b) low
(c) moderate
(d) None of these
69. Aqueous solutions of ionic compounds are:
(a) non-conductor of electricity
(b) conductor of electricity ✓
(c) sometimes conduct electricity
(d) partial conductor of electricity
70. Ionic compounds usually dissolve in:
(a) covalent solvent
(b) ionic solvent
(c) polar solvent ✓
(d) non-polar solvent
71. Ionic compounds are insoluble in:
(a) covalent solvent
(b) ionic solvent
(c) polar solvent
(d) non-polar solvent ✓
72. Which one of these is polar solvent?
(a) oil
(b) water ✓
(c) petrol
(d) kerosene oil
73. As compared to ionic bond, covalent bonds are generally:
(a) weak ✓
(b) strong
(c) stable
(d) unstable
74. Sugar crystals and diamond are the examples of:
(a) ionic compounds
(b) covalent compounds ✓
(c) polar compounds
(d) non-polar compounds
75. Non-polar covalent compounds are generally:
(a) soluble in water
(b) insoluble in water ✓
(c) sometimes insoluble in water
(d) sometimes soluble in water
76. Polar covalent compounds are soluble in:
(a) oil
(b) water ✓
(c) petrol
(d) kerosene oil
77. They do not conduct electricity in the solid, molten or aqueous solution.
(a) Ionic compounds
(b) polar compounds
(c) non-polar compounds ✓
(d) All of these
78. They are bad conductors of electricity.
(a) covalent compounds ✓
(b) ionic compounds
(c) polar compounds
(d) None of these
79. Which one is a polar covalent compound?
(a) CO2
(b) CH4
(c) C2H6
(d) HCl ✓
80. Which one is non-polar covalent compound?
(a) H2SO4
(b) CO2 ✓
(c) H2O
(d) HF
81. It is a common white glue.
(a) Polyurethane
(b) Resin glue
(c) Polyvinyl acetate ✓
(d) Epoxy resins
82. It is used in the construction of vehicles, trucks, boats and aircraft.
(a) Polyurethane
(b) Resin glue
(c) Polyvinyl acetate
(d) Epoxy resins ✓
Assalamualaikum! Dear sir mcq no 19 answer is wrong.The correct answer is covalent bond.
ReplyDeleteWa alaikum Assalam, Yes you are right, we have made correction.
DeleteJAZAKALLAH
Sahi hai 19th mcqs
DeleteJAZAKALLAH
DeletePlz upload more MCQs
ReplyDeleteQ no.2 and Q no. 14 are wrong. Please mark them correct!
ReplyDeleteYe, You are right MCQs.No.2 (Text book pg no. 81) is wrong- its correct answer is Hydrogen bond.
DeleteBut MCQs No.14 is correct (text book pg no.88)
We have made correction.
Thank you so much for feed back
JAZAKALLAH
pleas upload more mcqs from all chapter
ReplyDelete