Chemistry Chapter 10 Entry Test MCQs
26. Covalent bonds are least likely to be formed..
a. By head of the group elements with high ionization energies
b. Between atoms of the same element
c. Between an element in Group I and an element in Group VII
d. Between atoms of different elements on the right of the periodic table
27. Which type of bond is not present in HNO2 molecule?
a. Ionic as well as coordinate
b. Covalent.
c. Ionic
d. Coordinate.
28. The two atoms X and Y lie on the top of group 2 and group 16, respectively. On combination, they form compound of the type
a. X2Y
b. X2Y2
c. XY2
d. XY
29. In HF molecule the % ionic character and covalent character are respectively:
a. 43%, 57%
b. 60%, 40
c. 57%, 43%
d. 40%, 60%
30. Element X is in Group 2 and element Y is in Group 7, of the periodic table. Which ions will be present in the compound formed when X and Y react together?
a. X+ and Y-2
b. X+ and Y–
c. X2- and Y+
d. X2+ and Y–
31. Three consecutive elements X, Y and Z are present in the periodic table, If Z belongs to group IA, Then ion of X is
a. X-2
b. X+
c. X–
d. X+2
32. Lattice energy of an ionic compound depends upon
a. Size of the ion only.
b. Packing of ions only.
c. Charge on the ion only
d. Charge on the ion and size of the ion.
33. The correct order of the lattice energies of the following ionic compounds is
a. Al2O3 > CaO > MgBr2 > NaCl
b. NaCl > MgBr2 > CaO > Al2O3
c. MgBr2 > Al2O3 > CaO > NaCl
d. NaCl > CaO > MgBr2 > Al2O3
VSEPR + VBT
34. The electronic configuration of nitrogen is 1s2,2s2,2px1,2py1,2pz1. What type of overlapping of 2p orbitals takes place on priority basis.
a. Parallel overlapping b/w 2py orbitals
b. Linear overlapping b/w 2px orbitals
c. All the overlapping occur simultaneously
d. Parallel overlapping b/w 2py orbitals
35. Total no. of sigma and Pi(π) bonds in one molecule of H3PO4 are:
a. 12
b. 5
c. 16
d. 8
36. Which of the following has four loan pair of electrons in its outermost orbitals?
a. O–
b. Ne+
c. I0
d. Cl–
37. Among the following pairs, the one in which the two species are not isostructural is:
a. l03– & XeO3
b. BH4– & NH4+
c. PF6– & SF6–
d. SiF4 & SF4
38. The correct order in which the O-O bond length increases in the following is:
a. H2O2 < O2 < O3
b. O2 < H2O2 < O3
c. O2 < O3 < H2O2
d. O3 < H2O2 < O2
39. In which of the following reactions is the bond angle in the product greater than that in the reactants?
a. CO2 +OH- → HCO3-1
b. H2O + H+ → H3O+
c. C2H2 +H2 → C2H4
d. C2H4 + H2 → C2H6
40. Which of the following molecule has non zero dipole moment?
a. PCl5
b. PH3
c. CO2
d. SF6
41. According to VSEPR theory, maximum repulsion between the electron pair is:
a. bond pair- lone pair
b. bond pair- bond pair
c. depends on the nature of central atom
d. lone pair- lone pair
42. The shape of CO2 molecule is similar to:
a. NO2+
b. H2S
c. SnCl2
d. SO2
43. How do bond length and bond strength change as the number of bonds between two atoms increases:
a. Bond length decreases and bond strength increases
b. Bond length increases and bond strength increases
c. Bond length decreases and bond strength decreases
d. Bond length increases and bond strength decreases
44. Which of the following has planar trigonal geometry?
a. PCl3
b. ClF5
c. NH3
d. AlCl3
45. Which of the following has planar trigonal geometry?
a. PCl3
b. ClF5
c. NH3
d. AlCl3
46. During 4sp3 hybridization of orbitals, the angle have no possibility of orientation around the central atom:
a. 1070
b. 1090
c. 1040
d. 1200
47. The pair having similar geometry is:
a. CO2, SO2
b. NH3, PH3
c. BF3, NH3
d. C2H2, H2O
48. A molecule with AX2L2 will have the shape:
a. V-shaped
b. Tetrahedral
c. Pyramidal
d. Triangular planar
49. The carbon atom in CO is:
a. sp hybridized
b. sp3 hybridized
c. not hybridized
d. sp2 hybridized
50. In BF3, the covalent bond is due to:
a. s-sp3 overlap
b. s-sp overlap
c. p-sp2 overlap
d. s-sp2 overlap