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Chemical Bondin...

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  • Question 1
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    During the formation of a chemical bond

  • Question 2
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    Among the following the maximum covalent character is shown by the compound

  • Question 3
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    Which one of the following is paramagnetic?

  • Question 4
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    Hybridization of C2and C3of H3C − CH = C = CH − CH3 are

  • Question 5
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    A species $$H_2O^+$$ pyramidal in shape. The number of lone pairs of electrons is:

  • Question 6
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    The number of $$\sigma$$ and $$\pi$$ bonds in $$C_2H_2$$ is:

  • Question 7
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    Which of the following would not have a dipole moment?
    (i)  $$CCl_4$$                            (iii) $$1, 2$$-dichloroacetylene
    (ii) trans-$$1, 2$$-dichloroethene      (iv) $$CH_2Cl_2$$

  • Question 8
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    The heat of combustion of carbon to $$CO_2$$ is –393.5 kJ/mol. The heat released upon formation of 35.2 g of $$CO_2$$ from carbon and oxygen gas is:

  • Question 9
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    Directions For Questions

    Between ionic and covalent bonds, there are a large majority of bonds, in which the bonding electrons are shared unequally between two atoms but are not completely transferred. Such bonds are said to be polar covalent bonds and the bond polarity is due to the difference in electronegativity, the ability of an atom in a molecule to attract the shared electrons in a covalent bond.
    The measure of net polarity is a quantity called the dipole moment, $$\mu$$ which is defined as the magnitude of the charge Q at either end of the molecular dipole times the distance $$r$$ between the charges: $$\mu = Q \times r$$. Molecular polarities give rise to some of the forces that occur between molecules and these forces are of several different types including dipole-dipole forces, London dispersion forces, and hydrogen bonds. All these intermolecular forces are electrical in origin and result from the mutual attraction of unlike charges or the mutual repulsion of like charges.

    ...view full instructions

    In which of the following mixtures, the London dispersion force acts as a major intermolecular force of attraction?

  • Question 10
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    In which of the following pairs, indicated bond is of greater strength?

  • Question 11
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    In which of the above compounds, the indicated bond is of greater strength?

  • Question 12
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    Which of the following molecules will not have a dipole moment?

  • Question 13
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    Among the following molecules, the correct order of $$C - C$$ bond length is:

  • Question 14
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    The total number of lone-pair of electrons in melamine is:

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