CHEMICAL-BONDING-QUIZ-4

CHEMISTRY CHEMICAL BONDING QUIZ-4

Dear Readers,

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Q1. In acetylene molecule, between the carbon atoms there are

•  Three pi bonds
•  One sigma and two pi bonds
•  Two sigma and one pi bonds
•  Three sigma bonds

Solution

Q2.The molecule which has zero moment is

•  CH₃ Cl
•  NF₃
•  BF₃
•  ClO₂

Solution
The molecules having distorted geometry have dipole moment and those having regular geometry have zero dipole moment. 

 ∵ NH₃,CH₃ Cl and ClO₂ have distorted geometry. 

 ∴ They have dipole moment. 

 ∵BF₃ has regular triangular planar geometry. 

 The dipole moment of BF₃ is zero.

Q3.  Which molecule has zero dipole-moment?

•  HF
•  HBr
•  H₂O
•  CO₂

Q4. Which of the following will show least dipole moment?

•  Ethane
•  Ether
•  Ethanol
•  Water

Q5.Which of the following element has higher ionisation energy?

•  Boron
•  Carbon
•  Oxygen
•  Nitrogen

Solution
  Ionization energy order is B< C< O< N.

Q6. The hybridization of P in PO₄^3- is same as in:

•  I in ICl₄^-
•  S in SO₃
•  N in NO₃^-
•  S in SO₄^2-

Solution
P in PO₄^3-has sp³-hybridization like S in SO₄^2-.

Q7.C-C bond order in benzene is

• 1
•  2
•  Between 1 and 2
•  None of these

Solution

Q8. Which species is paramagnetic?

•  O₂^-
•  CH₃^-
•  CO
•  NO⁺

Solution
O₂^- has one unpaired electron.

Q9.Hybridization state of I in ICl₂⁺ is :

•  dsp²
•  sp
•  sp²
•  sp³

Solution
It is the hybridization of ICl₂⁺.

Q10. In which set of molecules are all the species paramagnetic?

•  B₂,O₂, N₂
•  B₂,O₂, NO
•  B₂,F₂,O₂
•  B₂,O₂, Li₂