MDCAT Chemistry Chemical Bonding Test Online

1. Which hydrogen halide among the following has the highest percentage of ionic character?

2. If the value of principal quantum number is 3, the total possible values for magnetic quantum number will be

3. Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to the highest energy

4. Choose the correct statement

5. Nitrogen gas is chemically inert gas due to the reason that

6. Which of the following species is paramagnetic?

7. The electro negativities of F, Cl, Br and I are 4.0, 3.0, 2.8, 2.5 respectively. Hydrogen halide with a high percentage of ionic character is

8. When potassium metal is exposed to violet light

9. An oxygen atom has mass of

10. How many molecular orbitals may be constructed from the valence shell orbitals of the constituent atoms in CH₄?

11. Which of the following value of Electronegativity difference corresponds the formation of Ionic Bond?

12. According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be

13. Elements with ________ first ionization energies and ________ electron affinities generally from cations. Choose the correct point

14. Which of the following is the best explanation that CO₂ is a non-polar molecule?

15. Force responsible to hold atoms together in a compound is called

16. Which of the following has maximum e/m value for positive rays?

17. When two ice cubes are pressed over each other, they unite to form one cube. Which of the following forces is responsible to hold them together?

18. A long a period E.N __________ from left to right

19. The central atom in BrF₅ has _?_ bonding pairs of electrons and _?_ non-bonding pairs of electrons.

20. Which orbital of the following has a principal quantum number of 3 and an angular momentum quantum number of 27?

21. Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

22. Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding?

23. By combining n atomic orbital, numbers of hybrid orbitals will be

24. 2nd orbit is away from nucleus for H-atom as compared to first orbit

25. Geometry of simple molecule having SP³ hybrid orbital is

26. Which of the following equation represents the 1^st ionization energy of Na?

27. Azimuthal quantum number of last electron of ₁₁Na is

28. Quantum umber values for 2p orbitals are

29. The ionization energy

30. Which one shows high % age of the ionic character?

31. The number of σ and π-bonds present in pent-4-en-l yne is

32. Bond order for N2 molecule is

33. If the molecule of HCl were totally polar, the expected value of dipole moment is 6.12 D (Debye) but the experimental value of dipole moment was 1.03 D. Calculate the percentage ionic character.

34. A chemist poured juice on soil. Which idea may he have in his mind?

35. Which of the following would have a permanent dipole moment?

36. Electronic configuration of K is

37. The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

38. A molecule in which sp² hybrid orbitals are used by the central atom in forming covalent bonds is

39. When 6d orbital is complete, the entering electron goes into

40. In a double bond connecting two atoms there is a sharing of

41. Which of the solid does not contain covalent bond

42. Number of sigma bonds in P₄O₁₀ is

43. Energy released or absorbed when electrons are added in atom is

44. The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1 : 1 is

45. 1 erg of energy corresponds to

46. Colour of the glow produced in the discharge tube

47. What happens to IP value if shielding effect is greater?

48. Atom with higher atomic number produces X-rays of

49. XeF₄ has shape of

50. Which carbon is more electronegative?

51. The number of significant figures in 0.00200 is

52. The shape of H₃O⁺ is

53. Which of the following molecule has Ā bond

54. Which of the following contains both polar and non-polar bonds?

55. Which of the following will have highest value of electron affinity

56. Which of the following has more unpaired d-electrons?

57. A lone pair of electrons in an atom implies

58. Which one of the following pairs of atoms is most likely to form an ionic bond?

59. Which of the following molecules has no net dipole moment?

60. Pick out the molecule which has zero dipole moment

61. Which of the following geometry is associated with the compound in which the central atom assumes sp³ d hybridization?

62. In acetylene molecule, the two carbon atoms are linked by

63. In OF₂, number of bond pairs and lone pairs of electrons are respectively

64. When a double bond is formed between two atoms, one of the bonds is a sigma bond and the other is a pi bond. The pi bond is created by the overlap of……

65. Which quantum number is sufficient to describe the electron is hydrogen atom?

66. Which of the following molecules does not have a net dipole moment?

67. The structure of ICl₂¯ is

68. Which of the following species has lone pair of electrons on central atom?

69. Ammonia has a net dipole moment while boron trifluoride has zero dipole moment because

70. The spectrum of helium is expected to be similar to that of

71. The carbon atoms in calcium carbide are held by

72. Which molecule is polar among the following?

73. Which of the following orbitals have a dumb bell shape?

74. Shape of CIO₃¯ is

75. The relative attraction of the nucleus for the electrons in a chemical bond is called

76. Ionic radius in a period from left to right

77. The force which holds the atoms together to form a compound is known as

78. When two hydrogen atoms approach to form a chemical bond

79. The relative attraction of the nucleus for the electrons in a chemical bond is called

80. Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers l = 1 and l = 2 are respectively

81. Which of these molecules require more bond energy?

82. Outermost shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

83. Fluorine has an atomic number 9 and Chlorine has 17. Which one has the highest electron affinity?

84. Water (H₂O) is liquid while hydrogen sulphide (H₂O) is a gas because

85. The total number of possible values of magnetic quantum number for the value of l = 3 is

86. The de-Broglie wavelength of a particle with mass 1 g and velocity 100 m/s is

87. If atomic numbers of nickel and copper are 28 and 29 respectively. Which of the following does the electronic configuration 1s² 2s² 2p⁶3s²3p⁶3d⁹ represent?

88. Which kinds of bonding can be found in a sample of H₂O(l)?

89. Among the alkaline earth metals the element forming predominantly covalent compounds is

90. Which of the following element’s outermost orbits last electron has magnetic quantum number m = 0?

91. Bohr’s model atom is contradicted by

92. Lewis acids are

93. Nuclear radiation is emitted by those elements whose

94. In CCl₄, the four valencies of carbon are directed towards the corners of a

95. In BrF₃ molecule, the lone pairs occupy equatorial positions to minimize

96. Maximum hydrogen bonds in water are,

97. Lateral overlapping expected in

98. ____________ has their outermost shell complete in atomic form

99. Unit of dipole moment is

100. Molecular orbitals are filled according to

101. Which of the following hydrides has the lowest boiling point?

102. According to MO theory, the species O⁺₂ possesses

103. Which of the following is not absolute term of element?

104. Geometry of molecule will be pyramidal if the outer post shell of the central atom has

105. Which one of these is weakest?

106. Which of the following is not isoelectronic?

107. Which of the following has unchanged valency?

108. Which of the following compounds can form hydrogen bond?

109. Inter molecular forces in solid hydrogen are

110. Which of the following is a non-directional orbital

111. Hydrogen chloride molecule contains

112. The twelve enter most electrons in O₂ molecule are distributed according to MOT as under. Find the correct one.

113. Which is not true with respect to cathode rays?

114. On sp3 hybridization

115. Which of the bonds, shown by the ___________ has the greatest polarity?

116. Deflection of blue light is lesser than violet because

117. In O2 each oxygen atom is hybridized

118. The number of anti-bonding electron pairs in O₂²¯ molecular ion on the basis of MOT is

119. The boiling point of heavy water is

120. Choose the correct statement about 2nd ionization energy

121. The nature of positive rays depends upon

122. Find the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25

123. Which has the minimum bond angle?

124. Fluorine molecule is formed by

125. For principle quantum number, n = 4, the total number of orbitals having 1 = 3 is

126. Molecular orbital picture of N₂ indicates

127. Geometry of simple molecule having sp3 hybrid orbital is

128. The electronegativity of elements in a period from left to right

129. Which one among the following does not have the hydrogen bond?

130. The shape of ClO₃ according to valence shell electron pair repulsion theory will be

131. Bond angle in water is

132. Which of the following is the correct electron – dot formula of CO₂?

 

133. Along a period the atomic radii

134. In Millikan oil – drop experiment, the charges on several different oil drops were as: -5.92. – 4.44, -2.96, -8.88. The units are arbitrary. Choose the likely value of the electronic charge in these arbitrary units?

135. The shape of the molecule SF₂Cl₂ is

136. The four quantum numbers of the valency electron of potassium are

137. Which of the following is to isoelectronic with rest of three?

138. The number and type of bonds between carbon atoms in calcium carbide are

139. Keeping in view the bonding molecular orbitals, find the incorrect statement

140. The spectrum of He is expected to be similar to that of

141. Which of the sub – atomic particles is not charged?

142. According to VSPER theory, ammonia molecule has --------- shape

143. The energy of a photon is given as, ∆ E/atom = 3.03 x 10¯¹⁹ J atom¯¹ then, the wavelength (λ) of the photon is

144. Which of the following has the greatest covalent character?

145. Which of the following is a non-directional orbital?

146. An electron has principal quantum number 3. The number of its (i) subshells and (ii) orbitals would be respectively

147. Which of the following statements about positive ions is incorrect?

148. The bond order in NO is 2.5 while that is NO⁺ is 3. Which of the following statements is true for these two species?

149. The bond angle H – O – H in ice is closest to

150. The third line of the Balmer series, in the emission spectrum of the hydrogen atom, is due to the transition from the

151. Effective magnetic moment of Sc³ ion is

152. The number of d-electrons retained in Fe²⁺ (At. No. of Fe = 26) ions is

153. Covalent compounds are soluble in

154. According to VSEPR theory, the shape of the water molecule is

155. Al become isoelectronic with Ne

156. If the radius of first Bohr orbit be ɜ₀, then the radius of third Bohr orbit would be

157. In which one of the following does the central atom not possess can octet in its outer shell?

158. Pi bonds are produced by overlapping of

159. Which of the following has zero depolemoment?

160. The nature of inter-particle forces in benzene is

161. A student subtracted 0.00055 from 10.2345678 and reported the result as 10.23401. But his friend told him that result was wrong. What is the correct result?

162. Anti-bonding MO is formed by

163. The velocity of photon is

164. The energy required to remove electron from an atom is called

165. Energy of an atom in a compound is

166. Unit of dipole moment is

167. The correct set of quantum numbers (n, l and m) respectively of the unpaired electron of chlorine atom is:

168. How many sigma and pi bonds are present in tetra cyano ethylene?

169. The value of e/m ratio of electron is:

170. With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

171. The relative attraction of the nucleus for the electrons in a chemical bond is called

172. The energy of the first electron in helium will be

173. Element having the smallest atomic radius among the following is

174. The configuration 1s² 2s² 2p⁵ 3s¹ shows

175. In the ground state, an element has 13 electrons in its M shell. The element is

176. Formulation of chemical bond between atoms of elements is based on

177. Noble gases are most stable of all other elements because

178. Which one of the following molecules shows high percentage of ionic character?

179. When 2 lone pair and 2 bond pair are around the central atom reduction in the bond angle is up to. (in degrees)

180. Number of π-bonds in naphthalene is

181. H-bonding is not present in

182. In which of the following pairs, the numbers of electrons in the outermost shell are different?