CHEMICAL-BONDING-QUIZ-2

CHEMISTRY CHEMICAL BONDING QUIZ-2

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Q1. The molecule having largest dipole moment among the following is:

•  CHl₃
•  CHl₄
•  CHCl₃
•  CCl₄

Solution
CHCl₃molecule has largest dipole moment among the given species.

Q2.The molecule which has T – shaped structure is

•  PCl₃
•  ClF₃
•  NH₃
•  BCl₃

Solution

Q3.  Linear combination of two hybridized orbitals, belonging to two atoms and each having one electron leads to:

•  Sigma-bond
•  Double bond
•  Coordinate covalent bond
•  Pi-bond

Solution
Head on overlapping give rise to σ-bond formation.

Q4. 

•  +152 kJmol^-1
•  -610 kJmol^-1
•  -850 kJmol^-1
•  +120 kJmol^-1

Solution

Q5.A molecule in which sp²-hybrid orbitals are used by the central atom in forming covalent bond is:

•  He₂
•  SO₂
•  PCl₅
•  N₂

 

Q6. The types of bonds present in CuSO₄∙5H₂ O are only

•  Electrovalent and covalent
•  Electrovalent and co-ordinate
•  Electrovalent, covalent and co- ordinate covalent
•  Covalent and co-ordinate covalent

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Q7.The ionization potential order for which set is correct?

• Li>K>Cs
•  B>Li>K
•  Cs>Li>B
•  Cs< Li< K

Solution
IP₁ofB>IP₁of Li ENC of boron is more than Li. Also IP₁ of Li>IP₁ of K because removal of electron in K occurs from 4s.

Q8. The bond angle in PH₃ is:

•  Much lesser than NH₃
•  Equal to that in NH₃
•  Much greater than in NH₃
•  Slightly more than in NH₃

Solution
Bond angles decrease on moving down the group for similar compounds, i.e., NH₃>PH₃>AsH₃>SbH₃.

Q9.The hydrogen bonding is strongest in:

•  O—H…S
•  S—H…O
•  F—H…F
•  F—H…O

Solution
H—bonding order: ⋯H-F>⋯H-O>⋯H-N

Q10. Van der Waals’ forces between molecules depend upon:

•  Number of electrons
•  Charge on nucleus
•  Radius of atoms
•  All of these

Solution
These are the factors on which van der Waals’ forces depend.