UNIT 4 Basic Chemistry Question Bank PDF

G H Raisoni College of Engineering and Management, Nagpur Question Bank Year : First (I SEM) Subject :Basic Chemistry (311305) Unit 4- Chemical Bonding (Total Marks-09) 1. Tendency of atoms t...

G H Raisoni College of Engineering and Management, Nagpur Question Bank Year : First (I SEM) Subject :Basic Chemistry (311305) Unit 4- Chemical Bonding (Total Marks-09) 1. Tendency of atoms to acquire 8 electrons in their valence shell is …… (a) Octet rule (b) Duplet rule (c) Triplet rule (d) All of the above 2. Noble gases exist as…………. (a) Monoatomic (b) Diatomic (c) Polyatomic (d) None of these 3. Charge on any ion depends upon gain or loss of........ (a) Electrons (b) Protons (c) Neutrons (d) Double covalent bond 4. The force of attraction which holds the atom together in a molecule is called …….. (a)Valency electron (b) Hydrogen bond (c)Chemical bond (d) Electrostatic force 5. The last orbit is removed from an atom of element then the remainder called as ……. (a) Electron (b) Proton ( c) Neutron (d) Kernel 6. Electrons are usually lost by………………. (a) Metals (b) Non-metals (c) Inert Gases (d) All of the above 7. Resulting a loss of electrons forms………… (a) Anodes (b) Cathodes (c) Negative ions (d) Positive ions Dr. S. K. Mandavgade Page 1 8. Metals and non-metals combine to give electronic configuration of........ (a) alkalies (b) noble gases (c) metalloids (d) acids 9. To form anion, non-metal atom………. (a) Looses electrons (b) Gains electrons (c) Looses protons (d) Gains protons 10. To form cation, metal atom………. (a) Looses electrons (b) Gains electrons (c) Looses protons (d) Gains protons 11. The noble gases such as helium, neon are ……….. a) Diatomic b) Triatomic c) Monatomic d) polytechnic 12. When the bond formed between the atoms of element they achieve…… a) stable configuration of noble gas b) further reaction c) avoid reaction d) none of these 13. Metal atoms …….. (a) Lose their outer electrons (b) Become positively charged (c) Become negatively charged (d) Both (a) & (b) 14. Molecule of chlorine gas is ------ a) Monoatomic b) triatomic c) Tetraatomic d)Diatomic 15. Covalent compounds are insoluble in a liquid---------- (a)Benzene (b) water (c) Carbon tetrachloride (d) Acetone 16. Ionic compounds are soluble in a liquid---------- (a)water (b) Kerosene (c) Benzene (d) Acetone Dr. S. K. Mandavgade Page 2 17. There is loss of electron take place by---------- (a) Noble gas (b) metals ( c) nonmetals (d) none of these 18. Electrovalent bond is another name of ……….. (a) Metallic bond (b) Covalent bond (c) Ionic bond (d) Co-ordinate bond 19. The complete transfer of one or more electrons between atoms constituting in forming……….. (a) Ionic Bond (b) Covalent Bond (c) Co-ordinate Bond (d) Dative Bond 20. When molecule is formed by chemical bonding then………. (a) Nucleus of combining atoms participate (b) Valence electrons of combining atoms participate (c) Valence electrons & inner cell electrons participate (d) None of the above 21. When magnesium reacts with oxygen, nature of bond formed is… (a) Ionic (b) Covalent (c) Metallic (d) Dative 22. Bond formed by sharing of four electrons is called as......... (a) covalent bond (b) electrovalent bond (c) dative covalent bond (d) double covalent bond 23. Representation of bond by a single, double or triple line is done in………. (a) Metallic Bond (b) Co-ordinate Bond (c) Covalent Bond (d) Ionic Bond 24. The mutual sharing of electron take place to form ……….compound. (a) Electrovalent (b) Ionic (c) Covalent (d) Coordinate 25. Covalent compounds are…………….. (a) Good conductors of electricity (b) Non conductors of electricity (c) Poor conductors of electricity (d) None of the above Dr. S. K. Mandavgade Page 3 26. Nitrogen molecule is formed by mutual sharing of ------pair of electrons. (a) five (b) three (c) two (d) one 27. In ammonium ion, electrons required between hydrogen ion and nitrogen ion are........ (a) 1 (b) 2 (c) 3 (d) 4 28.When the bond is formed by sharing of one pairs of electrons by atoms, then the bond is called as....... (a) single covalent bond (b) double covalent bond (c) triple covalent bond (d) ionic bond 29. Attempt in ionic bond formation is ………… (a) To get rid of excess electrons (b) To attain configuration of noble gases (c) To avoid further reaction (d) All of the above 30. Nitrogen molecule is an example of………….. (a) Single covalent bond (b) Double covalent bond (c) Triple covalent bond (d) Single co-ordinate bond 31. Calcium chloride is formed by the ……………linkage. (a) Electrovalent (b) covalent (c) Coordinate bond (d) None of above 32. When single atom provides both electrons which are needed for completion of covalent bond then it leads to………………… (a) Ionic Bond (b) Covalent Bond (c) Co-ordinate Bond (d) Metallic Bond 33. Dative covalent bond is found in.......... (a) Ammonia (b) Ammonium ion (c) Urea (d) Nitrogen 34. For dative covalent bonding, one atom having a lone pair of electrons combines with............ (a) an electron deficient compound (b) an expanded octet (c) a proton of other atom (d) a neutron of other atom Dr. S. K. Mandavgade Page 4 35. Metals are good conductors due to………….. (a) Ionic Lattice (b) Crystalline Lumps (c) Mostly Solids (d) Delocalized Electrons 36. Physical properties of bonding are influenced by bonding between………….. (a) Atoms (b) Ions (c) Molecules (d) All of the above 37. Conduction of electricity in metallic bonding is due to the presence of … (a) Protons (b) Lattice (c) Delocalized Electrons (d) Nucleus 38. When covalent bond is formed between hydrogen atom & a very electronegative atom, then it is known as…….. (a) Ionic Bond (b) Hydrogen Bond (c) Co-ordinate Bond (d) All of the above 39. On which factor, conductance of metals depends? (a) Ions (b) Delocalized electrons (c) Atomic kernel (d) Number of Atoms 40. Metallic bond in metals decide………. (a) Metallic luster and hardness (b) Malleability and strength (c) Electrical and thermal conductivity (d) All of above 41. When only one atom provides the electron to form bond…………… a) Covalent bond (b) hydrogen bond c) Ionic bond (d) coordinate bond 42. Metals are having good conductivity because of….. a) Protons (b) neutrons c) localized electrons (d) nucleons 43. When the bond is formed by sharing of Two pairs of electrons by atoms, then the bond is called as....... (a) single covalent bond (b) double covalent bond (c) triple covalent bond (d) ionic bond Dr. S. K. Mandavgade Page 5 44. The two atoms of hydrogen combine with one atom of oxygen to form its compound a) Coordinate compound (b) Covalent compound c) Ionic compound (d) Electrovalent compound 45. In solids………. (a) Particles can move easily (b) Particles cannot move (c) Particles slide one another (d) None of above 46. If a compound is in liquid phase then………. (a) It assumes shape and volume of container (b) It has fixed volume and shape (c) It has fixed volume and takes shape of container (d) None of above 47. In molecular solids the atoms or molecules are hold by………. (a) Electrostatic forces of attraction (b) Attraction between positive kernel and electrons (c) Shared electron pairs (d) Van der Waals forces 48. The lattice site in pure crystal cannot be occupied by………… (a) Molecule (b) Ion (c) Electron (d) Atom 49. Crystal lattice is actually………… (a) Sum of points (b) Array of points (c) Lines of points (d) Triangles of points 50. In crystal lattice, particles are arranged in …………. (a) Two dimensions (b) Four dimensions (c) Three dimensions (d) Single dimensions 51. Unit cell is the smallest building unit of ……… (a) Crystal Lattice (b) Liquids (c) Gases (d) None of the above Dr. S. K. Mandavgade Page 6 52. Which of the following is not an amorphous solid? (a) Rubber (b) Glass (c) Sodium Chloride (d) None of the above 53. Regular arrangement in which atoms are closely packed together is called a……. (a) Tetrahedral Structure (b) Lattice (c) Crystal lattice (d) None of the above 54. The co-ordination number of BCC structure is……….. (a) 4 (b) 8 (c) 2 (d) 12 55. The crystal lattice of NaCl exhibits the type of ………. (a) Face centered structure (b) Body centered structure (c) Hexagonal closed packed structure (d) simple cubic structure 56. Face centered cubic structure contains………. (a) 8 atoms at 8 corners (b) 8 atoms at 8 corners with 1atom at centre (c) 8 atoms at 8 corners with 6 at 6 plane (d) Alternating layers of six atoms 57.When covalent compounds are dissolved in solvent produce ---------- (a)Ions (b) No ions (c) Electron (d) Protons 58. Molecules which have permanent dipole are known as …. (a) Polar (b) dipolar (c) non-polar (d) tripolar 59. When the bond is formed by sharing of three pairs of electrons by atoms, then the bond is called as....... (a) single covalent bond (b) double covalent bond (c) triple covalent bond (d) ionic bond 60. Which of the following characteristic does not possess by the metal? (a) Luster (b) ductility (c) Increase in conductance by increase in temp. (d) malleability Dr. S. K. Mandavgade Page 7 61. Weak forces between molecules are called as ……. (a) Molecular forces (b) intermolecular forces (c) Intramolecular forces (d) extramolecular forces 62. Conduction of electricity in metallic bonding is due to the presence of …… (a) Protons (b) ions (c) Delocalized electrons (d) nucleus 63. Sodium metal has crystal lattice………. (a) Simple cubic structure (b) Bodycentreed cubic structure (c) Face centered cubic structure (d) none of the above 64. Aluminium and gold has crystal lattice…….. (a) Body centreed cubic structure (b) Simple cubic structure (c) Face centered cubic structure (d) none of the above 65. Magnesium and zinc has crystal lattice. (a) Simple cubic structure (b) Body centered cubic structure (c) Face centered cubic structure (d) Hexagonal close packed structure 66. Which of the following is crystal lattice. (a) Glass (b) Diamond (c) Plastic (d) Sodium chloride 67. Metal atom losses electrons to form ……………… (a) Cation (b) Anion (c) Negative ion (d) None of these 68. Non metal atoms borrows electron to form………………….. (a) Positive ion (b) Anion (c) Cation (d) None of these 69. The gain of electron forms ……………… (a) Positive ions (b) Negative ions (c) Cathods (d) Anodes Dr. S. K. Mandavgade Page 8 70. Solids which have array of positive and negative ions arranged in a characteristic pattern throughout the crystal lattice are known as ……………… (a) ionic solids (b) covalent solids (c)molecular solids (d) metallic solids 71. Oxygen molecule is formed by ……………… covalent bond. (a) Double (b) Triple (c)Single (d) none of the above 72. A chemical bond is....................... (a) Transfer of electron (b) Sharing of electron (c)Donating a pair of electron (d) All of the above 73. Magnesium and zinc has the …………………..crystal lattice. (a) Simple cubic structure (b) Body Centre cubic structure (c) face centre cubic structure (d) Hexagonal close packed structure 74. Aluminum and Gold has the …………………..crystal lattice. (a) Simple cubic structure (b) Body Centre cubic structure (c) face centre cubic structure (d) None of these 75. The sharp melting point of crystalline solids is due to ………. (a) A regular arrangement of constituent particles observed over a short distance in the crystal lattice. (b) A regular arrangement of constituent particles observed over a long distance in the crystal lattice. (c) same arrangement of constituent particles in different directions. (d) different arrangement of constituent particles in different directions. 76. Maximum number of bonds between two atoms of a covalent bond can be ………. (a)three (b)one (c) two (d) four 77. The nucleus of an atom contains……. (a) proton only (b) neutron only (c) protons and neutrons (d) protons and electrons 78. A bond formed between two similar atoms cannot be………… (a) ionic (b) coordinate (c) covalent (d) π bond 79. An ionic compound is generally a ……. (a) good electrolyte (b) weak electrolyte (c) non electrolyte (d) neutral Dr. S. K. Mandavgade Page 9 80. An atom becomes ion when there is……… (a) gain of electron (b) loss of electron (c) gain or loss of electron (d) neither gain or loss of electron 81. In calcium chloride molecule ……………………. Linkage is formed. (a) No linkage (b) electrovalent linkage (c) coordinate linkage (d) coordinate covalent linkage 82. In magnesium oxide one atom of oxygen combines with ……….magnesium atom. (a) five (b) three (c) four (d) one 83. The electronic configuration after bond formation is of ………………………... (a) salt (b) solute (c) solvent (d) noble gases 84. ……………………… show tendency to lose the electrons. (a) noble gases (b) non-metals (c) metals (d) none of these 85. ……………………… accept(gain) the electrons to complete octet. (a) metals (b) non-metals (c) inert gases (d) none of these 86. The molecule of oxygen has ………………… atoms. (a) Two (b) four (c)three (d) one 87. The two atoms of hydrogen combines with one atom of oxygen to form its ………compound. (a) coordinate compound (b) covalent compound (c) Ionic compound (d) Electrovalent compound 88. When positive end of one molecule is attracted weakly to negative end of another molecule then force between them is known as ………………... (a) cohesive force (b) covalent linkage Dr. S. K. Mandavgade Page 10  (c) Electrostatic force (d) dipole dipole interaction 89. When covalent compounds are dissolved in solvent, they do not produce…………. (a) charge (b) ions (c) Electrons (d) protons 90. Atoms combine chemically either by transfer of electrons or by sharing the electrons from one atom to another to……… (a) attain noble gas configuration (b) complete the octet (c) Both (a) and (b) (d) None of these 91. The bond formed due to the electrostatic force of attraction between the negative and a positive ion is known as …………………….. (a) Electrovalent bond (b) covalent bond (c) coordinate bond (d) chemical bond 92. Formation of covalent bond can be visualized with the help of …………………… (a) Lewis dot diagrams (b) Langmuir dot diagrams (c) Both of these (d) None of these 93. Covalent bond can be observed between the atoms of …………………….. (a) metal and metal (b) non metal and non metal (c) metals and nonmetals (d) None of these 94. The atoms which shares its lone pair of electron with another atom is known as ………. (a) electron pair acceptor (b) electron pair donar (c) charge transfer atom (d) None of these 95. The bond between water molecule and a hydrogen ion to form hydronium ion (H3O)+ is a …….. (a) electrovalent bond (b) Coordinate bond (c) covalent bond (d) metallic bond 96. An ionic bond form by...................... (a) Sharing of valence electron (b) Transfer of valence electron (c) Joining of the atoms (d) transfer of the electron pair 97. The bond between carbon and hydrogen in CH4 molecules are………....….. (a) electrovalent bond (b) Coordinate bond Dr. S. K. Mandavgade Page 11  (c) covalent bond (d) metallic bond 98. An electrostatic force of attraction that exists between the metal ions and valence electrons is known as……… (a) electrovalent bond (b) Coordinate bond (c) covalent bond (d) metallic bond 99. Correct Order of Strength of the intermolecular forces of attraction is ------------ (a) Solids>Gases>Liquids (b)Solids>Liquids>Gases (c) Gases>Liquids>Solids (d) Gases>Solids>Liquids 100.The intermolecular forces of attraction between polar molecule and non-polar molecule are known as-- -------- (a) London forces of dispersion forces (b) Dipole-Dipole interaction forces (c) Dipole-induced dipole interaction force (d) Hydrogen bonding 101. The physical state of matter depends on------------ (a) Kinetics energy of the molecules of the matter (b) Intermolecular forces (c) Both (A) and (B) (d) None of these 102. Which of the following is/ are ionic solid (s)? (a) Sodium Chloride (b) Asphalt (c) Graphite (d) Ice 103. Which of the following are metallic Solids? (a) Iron (b) Cobalt (c) Nickel (d) All of these 104. Which is not characteristic property of the Solids? (a) Stronger intermolecular forces (b) Incompressibility (c) low boiling points (d) Low thermal energy 105. Which of the following are the examples of amorphous solid? a) Quartz glass b) Rubbers c) Plastics d) All of the above 106. A crystalline solid has …………… a) long range order b) disorder arrangement c) short range order d) none of these Dr. S. K. Mandavgade Page 12 107. A solid having irregular shape is called ……………………….. solid. (a) amorphous (b) crystalline (c) anisotropic (d) isomorphous 108. Glass is a ……………….. (a) super cooled liquid (b) crystalline solid (c) semi crystalline solid (d) liquid crystal 109. Crystals which are good conductor of electricity and heat are known as …………… crystals. (a) ionic (b) covalent (c) metallic (d) molecular 110. The number of atoms or molecules contained in one primitive or simple cubic unit cell is ……. a) 1 b) 2 c) 4 b) 6 111. If the number of atoms per unit in a crystal is 2, the structure of crystal is ……… a) octahedral b) body centered cubic c) face centered cubic d) simple cubic 112. Number of atoms per unit cell in a simple cubic unit cell……. a) 1 b) 2 c) 3 d) 4 113. Number of atoms per unit cell in a body centre cubic unit cell……. a) 1 b) 2 c) 3 d) 4 114. Number of atoms per unit cell in a face Centre cubic unit cell……. a) 1 b) 2 c) 3 d) 4 114. Number of atoms per unit cell in a hexagonal close pack unit cell……. a) 6 b) 2 c) 3 d) 4 115. ……………………….. is an example of crystalline soild. a) common salt b) butter c) Glass d) Tar 116. Graphite, diamond and fullerene are the allotropes of …………… Dr. S. K. Mandavgade Page 13  a) sulphur b) calcium carbonate c) carbon d) silicon dioxide 117. An electron sea is assumed to be present in ……………………solids. a) metallic b) ionic c) polar molecules d) non polar molecules. 118. Which of the following elements is most likely to form a covalent bond with chlorine? a) sodium b) carbon c) Iron d) Copper 119. Which is correct for solid? a) Intermolecular forces are stronger than gases and liquids. b) Solids are near incompressible. c) Solids have closed packed arrangement of the molecules or atoms d) All of these. 120. What type of bonds are present in metallic solids? a) Ionic bond b) Covalent bond c) Metallic bond d) Hydrogen bond 121. Which of the following metals is the softest? a) Sodium b) Potassium c) Calcium d) Magnesium 122. Which of the following is an example of ionic solids? a) NaCl b) Diamond c) Graphite d) Silicon 123. Which of the following is an example of metallic solids? a)NaCl b) Diamond c) Graphite d) Copper 124. The co-ordination number of Simple cubic structure is……….. (a) 4 (b) 6 Dr. S. K. Mandavgade Page 14  (c) 2 (d) 12 125. The co-ordination number of Face centre cubic structure is……….. (a) 4 (b) 6 (c) 2 (d) 12 126. The co-ordination number of hexagonal close pack structure is……….. (a) 4 (b) 6 (c) 2 (d) 12 127.Which is the name of the process by which an atom loses and gain of electron? (a) Ionization (b) Electron gain (c) Electro negativity (d) valency 128. Which type of unit cell has the highest packing efficiency? a) Simple cubic b) Body-centered cubic c) Face centered cubic d) Hexagonal close packed 129. Which type of unit cell has the lowest packing efficiency? a) Simple cubic b) Body-centered cubic c) Face centered cubic d) Hexagonal close packed 130. Which is the name of the force that holds the oppositely charged ions together? a) Magnetic force b) electrostatic force c) Covalent force d) van der waals force 131. After receiving of electron in the outer shell, an atom convert in the....... a) Positive ion b) negative ion c) molecule d) none of these 132. The theory of covalent bonding is explained by...................... a) Molecular orbital theory b) Lewis-Langmuir c) Bohr Theory d) None of the above 133. CCl4 is formed by...............bonds between chlorine and carbon atoms. a) coordinate b) Electrovalent c) Hydrogen bond d) covalent Dr. S. K. Mandavgade Page 15 134. Which of the following is not formed by electrovalent (ionic) bond? a) NaCl b) CaF2 c) H2 d) CuSO4 135. When a donar atom shares a pair of electron with an atom with empty orbital, it is known as..... a) Electrovalent bond b) Covalent bond c) coordinate bond d) Metallic bond 136. The bond between water molecule and a hydrogen ion to form hydronium ion (H3O+) is a....... a) Electrovalent bond b) Coordinate bond c) covalent bond d) Metallic bond 137. An electrostatic force of attraction that exist between the metal ions and valence electrons is known as a) Coordinate bond b) Electrovalent bond c) covalent bond d) Metallic bond 138. Which is not a characteristic property of the solids? a) strong intermolecular forces b) Incompressibility c) Low boiling point d) Low thermal energy 139. Glass is a..................... a) supercooled liquid b) crystalline solid c) semi crystalline solid d) liquid crystal 140. A solid having irregular shape is called as........................ a) amorphous b) crystalline c) anisotropic d) isomorphous 141. The existence of physical state (solid, liquid, gas) depend upon...... a) Intermolecular force of attraction b) Thermal energy c) Both a and b are correct d) None of the above 142. The solid, in which constituent particles are metal atoms are termed as..... a) Ionic solid b) Covalent solid c) Metallic solid d) None of the above 143. Crystal which good conductor of electricity and heat are known as................. crystal. a) Ionic b) covalent c) metallic d) molecular Dr. S. K. Mandavgade Page 16 144. Graphite, diamond and fullerene are the allotropes of....... a) sulphur b) calcium carbonate c) carbon d) silicon dioxide 145. Iodine crystals are the example of............ solid. a) molecular b) covalent c) metallic d) ionic 146. Who is created with the development of atomic theory. a) Archarya kanad b) Kossel and lewis c) Nagarjuna d) Sushruta 147. What type of bonds are present in metallic solids? a) Ionic b) covalent c) Metallic d) Hydrogen 148. Which type of unit cell has the lowest packing efficency. a) Simple cubic b) Body centre cubic c) Face centre cubic d) Hexzagonal close packed 149............................ is regarded as the repeatable entity of a crystal structure. a) Crystal b) Bravais index c) Unit cell d) Lattice 150. Which of the following is an example of a covalent network solid. a) NaCl b) Diamond c) Graphite d) Si ********************************************** Dr. S. K. Mandavgade Page 17