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Chemistry Test 209

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Chemistry Test 209
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Weekly Quiz Competition
  • Question 1
    4 / -1

    Equilateral shape has

    Solution

    Equilateral or triangular planar shape involves sp2 hybridisation. e.g.,BCl3.

     

  • Question 2
    4 / -1

    In which one of the following molecules the central atom can be said to adopt sp2 hybridization?

    Solution

     

  • Question 3
    4 / -1

    Which of the following does not apply to metallic bond?

    Solution

    Metallic bonds have electrostatic attraction on all sides and hence do not have directional characteristics.

     

  • Question 4
    4 / -1

    Which one of the following formulae does not correctly represent the bonding capacities of the two atoms involved?

    Solution

    The asterisk ( * ) marked carbon has a valency of 5 and hence this formula is not correct because carbon has a maximum valency of 4.

     

  • Question 5
    4 / -1

    Which one shows maximum hydrogen bonding?

    Solution

    H2O shows maximum H -bonding because each H2O molecule is linked to four H2O molecules through H -bonds.

     

  • Question 6
    4 / -1

    The complex ion [Co(NH3)6]3+ is formed by sp3d2 hybridisation. Hence the ion should possess

    Solution

    According to VSEPR theory, a molecule with 6 bond pairs must be octahedral.

     

  • Question 7
    4 / -1

    In compound X, all the bond angles are exactly 109∘28′, X is

    Solution

    As all C - Cl bonds are directed towards the corner of a regular tetrahedron

     

  • Question 8
    4 / -1

    Which structure is linear?

    Solution

    CO2 molecule is sp -hybridised and thus it is linear, while CO32− is planar (sp2 -hybridised), SO2 is an angular molecule with sp2 hybridisation and SO42− is tetrahedral (sp3− hybridised)

     

  • Question 9
    4 / -1

    Which one of the following is the correct order of interactions?

    Solution

    The van der Waals" forces are weakest forces and covalent bond is strongest, so the order of interactions is

    van der Waals' < H-bonding < dipole-dipole < covalent.

     

  • Question 10
    4 / -1

    Which of the following molecules has the highest bond order?

    Solution

    The bond order of O2+ = 2.5,O22− =1, O2− = 1.5 and that of O2 = 2

     

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