ECAT Chemistry Chapter 6 Chemical Bonding Online Test With Answers

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ECAT Chemistry Chapter 6 Chemical Bonding Online Test

Sr. # Questions Answers Choice
1 The bond order in No is 2.5 while that in NO+is 3.Which of the following statements is true for these two species? Bond length in NO<sup>+</sup>is greater than in NO Bond length in unpredictable Bond length in NO<sup>+</sup>is equal to that in NO Bond length in NO is greater than in NO<sup>+</sup>
2 Which carbon is more electronegative? sp<sup>3</sup>- hybridized carbon sp-hybridized carbon sp<sup>2</sup>-hybridized carbon always same irrespective of its hybrid state
3 Maximum hydrogen bonds in water are 4 3 2 8
4 In OF2, number of bond pairs and Ione paris of electrons are respectively 2,6 2,8 2,10 2,9
5 Which of the following has zero depole-moment? CIF PCl<sub>3</sub> SiF<sub>4</sub> CFCl<sub>4</sub>
6 Number of sigma bonds in P4O10is 6 7 17 16
7 The electronegativeities 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 HF HCL HBr HI
8 Shape of CIO3is Triangular pyramidal Tetrahedral Triangular planar Triangular bipyramidal
9 Fluorine molecule is formed by The axial p-p overlap The sidewise p-p overlap The axial s-p overlap The overlap of two sp<sup>2</sup>hybrid orbitals
10 The boiling point of heavy water is 108<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 101.4<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 99<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 110<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
11 Antibonding MO is formed by Addition of atomic orbitals Substraction of atomic orbitals Multiplication of atomic orbitals None of these
12 The number of antibonding electron pairs in O2-molecular ion on the basis of MOT is 4 3 2 5
13 The bond order of individual C - C bond is benzene is One Two Between one and two One and two alternately
14 The shape of gaseous SnCl2is Tetrahedral Linear Angular T-shaped
15 The shape of the molecule SF2Cl2is Trigonal bipyradmidal Cubic Octahedral Tetrahedral
16 The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1: 1 is Distrillation Crystallization Vapourisation Colour spectrum
17 According to VSEPR theory, the shape of the water molecule is Octahedral Distorted tetrahedral Planar triangle Linear
18 Which of the following hydrides has the lowest boiling point? H<sub>2</sub>O H<sub>2</sub>S H<sub>2</sub>S3 H<sub>2</sub>Te
19 The shape of CIO-3according to valence shell electron pair repulsion theory will be Planar triangle Pyramidal Tetrahedral Square planar
20 H-bonding is not present in Glycerine Water Hydrogen sulphide Hydrogen fluride
21 The structure of ICI2is Trigonal Trigonal bipyramidal Octahedral Square planar
22 Which of the following species is paramagnetic? CO<sub>2</sub> NO O<sup>2-</sup> CN
23 The nature of interparticle forces in benzene is Dipole-dipole interaction Dispersion force Ion-dipole interaction H-bonding
24 A molecule in which sp2hybrid orbitals are used by the central atom in forming covalent bonds in He<sub>2</sub> SO<sub>2</sub> PCl<sub>5</sub> N<sub>2</sub>
25 Which of the following has unchanged valency? H Na Fe Oxygen
26 Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding? Orbital overlap will not occur Bonding will not occur Both (A) and (B) are correct None of the above are correct
27 Which one of these is weakest? Ionest bond Covalent bond Metallic bond Van der Waal's forces
28 XeF4has shape of Sphere Trigonal bipyramidal Tetrahedral Square planar
29 Inter molecular forces in solid hydrogen are Covalent forces Van der Waal forces or London dispersion forces Hydrogen bonds All of these
30 According to MO Theory, the species O2+ possesses bond order of 2.5 three unpaired diamagnetic character stability lower then O<sub>2</sub>
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