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 angle H - O - H in ice ins closest to 120<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">° , 28<sup>'</sup></span> 60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 90<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 109<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
2 Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be XY X<sub>2</sub>Y X<sub>2</sub>Y<sub>3</sub> XY<sub>2</sub>
3 Which of the following geometry is associated with the compound in which the central atom assumes sp3d hybridization? Planar Pyramidal Angular Trigonal bipyramidal
4 Covalent compounds are soluble in Polar solvents Non-polar solvents Concentrated acids All solvents
5 Among the alkaline earth metals the element forming predominantly covalent compounds is Be Mg Sr calcium
6 Hydrogen chloride molecule contains Covalent bond Double bond Co-ordinate bond Electrovalent bond
7 Water H2O is liquid while hydrogen sulphide H2S is a gas beause Water has higher molecular weight Hydrogen sulphide is a weak acid Sulphure has high electronegativity than oxyhe Water molecules associate through hydrogen bonding
8 B-atom in BF3has sp<sup>3</sup>hybridization sp<sup>2</sup>hybridization sp hybridization no hybridization
9 Which of the following molecules have its central atom sp2hybridized CH<sub>4</sub> C<sub>2</sub>H<sub>2</sub> C<sub>2</sub>H<sub>4</sub> CCl<sub>4</sub>
10 Planar geometry of molecules is due to sp<sup>3</sup>hybridization sp<sup>2</sup>hybridization sp hybridization P - p overlap
11 Nitrogen in NH3is sp3hybridized but the bond angle in NH3is 107° and not 109.5° due to sp<sup>3</sup>orbital planar sp<sup>3</sup>orbital trigonal Repulsion between lone pair and bonded pairs None of them
12 The three N - Hσ-bonds are made by sp<sup>3</sup>- s overlap sp<sup>2</sup>- s overlap P - p overlap sp - overlap
13 Three sp2hybrid are co-planar at an angle of 104.5° 109.5° 107° 120°
14 During the formation of a chemical bond the potential energy of the system Decreases Increases Does not change None of these
15 The geometry of 4 sp3hybrid orbitals on an atom is Square planar Tetrahedral Trigonal planar Linear
16 Which of the following molecules have sp3hybridized carbon CH<sub>4</sub> C<sub>2</sub>H<sub>4</sub> C<sub>2</sub>H<sub>2</sub> CO<sub>2</sub>
17 Excitantion of an electron from 2s to 2p-orbital Transfer of three electrons from B to the other atoms Excitation of two electrons form 2s orbital to 2p orbital Formation of molecular ion
18 N-atom forms three covalent bonds, its electronic configuration is
19 In which of the following theories the hybridizationis considered Vsepr Lewis Molecule orbital Valence bond
20 In H2O molecule the bond angle is 90° 109.5° 107° 104.5°
21 The overlapping of two partially filled atomic orbital is in such a way that the probability of finding the electron pair is maximum along the axis joining the two nuclei, the bond is Sigma bond Pi bond Ionic bond Non-polar bond
22 One of the following bonds is polar but compound is non-polar H<sub>2</sub>O NH<sub>3</sub> HCl CO<sub>2</sub>
23 The bond order for He2molecule is zero 1/2 1 2
24 Tripple bond is present in O<sub>2</sub> H<sub>2</sub> N<sub>2</sub> Cl<sub>2</sub>
25 Coordinate covalent bond is present in the molecules H<sub>2</sub>O BF<sub>3</sub> SiO<sub>2</sub> SO<sub>2</sub>
26 The bond order O2molecule is 1 2 3 Zero
27 Which is made by coordinate covalent bond H<sub>3</sub>O<sup>+</sup> H<sub>2</sub>O CH<sub>4</sub> HCl
28 Which of the following molecules have multiple bonds CH<sub>4</sub> C<sub>2</sub>H<sub>4</sub> C<sub>2</sub>H<sub>6</sub> CCI<sub>4</sub>
29 Which of the following has polar bond O<sub>2</sub> N<sub>2</sub> HCl Cl<sub>2</sub>
30 The number of electron pairs shared in carbon tetrachloride molecule is 2 3 4 1
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