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Chemical Bonding and Molecular Structure Test - 2

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Chemical Bonding and Molecular Structure Test - 2
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  • Question 1
    1 / -0

    Octet of electrons, represents a particularly stable electronic arrangement.. Atoms achieve the stable octet when they are linked by chemical bonds. This rule is associated with one of the following theories

    Solution

    Lewis developed electronic theory of valence or theory of chemical bonding to explain the formation of chemical bond between the two atoms.

    According to the electronic theory of valence, every atom tries to attain octet configuration (presence of eight electrons) in its valence shell by losing or gaining or by sharing of electrons. This is known as the "Octet Rule".

    The electrostatic forces of attraction that holds the two oppositely charged ions together are known as "electrovalent bond".

     

  • Question 2
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    Which of the following statements about electrovalent substances is false?

  • Question 3
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    Which of the following has the greatest covalent character?

  • Question 4
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    The dipole moments of diatomic molecules AB and CD are 10.41 D and 10.27 D, respectively, while their bond distances are 2.82 Ao and 2.67 Ao, respectively. What does this indicate? [Electronic charge (q) = 4.8 x 10-10 esu]

  • Question 5
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    Which of the following compounds/ions will have the maximum bond angle?

  • Question 6
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    The numbers of bond pairs and lone pairs in ammonia molecule are _______, respectively. 

  • Question 7
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    Which of the following geometrical configurations corresponds to dsp2 hybridisation?

  • Question 8
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    The bond formed, as a result of the electrostatic attraction between the positive and negative ions was termed as

    Solution

    Chemical bond formed between two atoms due to transfer of electron(s) from one atom to the other. atom is called "Ionic bond" or "electrovalent bond".

    in electrovalent bond one atom loses an electron to form a positive ion and the other atom gains the electron to form a negative ion. The resulting ions are held together by electrostatic attraction

     

  • Question 9
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    788 kJ of energy is required to separate one mole of solid NaCl into one mole of Na+ (g) and one mole of Cl− (g) to an infinite distance. This process explains

    Solution

    Lattice enthalpy is simply the change in Enthalpy associated with the formation of one mole of an ionic compound from its oppositely charged ions in their standard states under standard conditions.

     

  • Question 10
    1 / -0

    Which of the following is the least ionic?

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