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CAPF - Chemical Bonding Test 1282
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CAPF - Chemical Bonding Test 1282
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  • Question 1/10
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    Which of the following statement is not correct regarding covalent bond?
    Solutions

    The bond formed by atoms by mutually sharing their electron pairs is known as covalent bond. Compounds with covalent bonds are poor conductor of electricity. The covalently bonded molecules have strong bond within the molecules,but their inter-molecular forces are weak. This makes the boiling and melting point of these compounds low.

  • Question 2/10
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    When an electron breaks a covalent bond, and moves away
    Solutions

    When electron breaks a covalent bond then at the place of electron a hole is created and thus due to this vacant place occupied by holes a valency is created in broken covalent bond.

  • Question 3/10
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    Ionic bond can be formed between two atoms when
    Solutions
    A low ionization energy helps in formation of cations and high electron affinity helps in the formation of anions. Thus, cation having a low ionization energy and an anion with a high electron affinity combine together to form an ionic compound having strong bonds. 
  • Question 4/10
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    Which of the following option is incorrect about the ionic bond?
    Solutions

    • Ionic bonding is the complete transfer of valence electron between atoms.

    • It is a type of chemical bond that generates two oppositely charged ions.

    It results from gaining, losing & transfer of electrons

    • Covalent bonding occurs when pairs of electrons are shared by atoms.

  • Question 5/10
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    Hydrogen Bond is represented by a ______________ line?
    Solutions

    In HF molecule, the hydrogen bond exists between the hydrogen atom of one molecule and a fluorine atom of another molecule as depicted below;

    ----Hδ + - Fδ - -----Hδ + - Fδ - -----Hδ + - Fδ –

    Here, hydrogen bond acts as a bridge between two atoms which holds one atom by a covalent bond and the other by a hydrogen bond.

    Hydrogen-bond is represented by a dotted line (----) while a solid line represents the covalent bond.

    Thus, Option B is the correct answer.

  • Question 6/10
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    Hybridisation involves
    Solutions

     Merging (mixing) of dissimilar orbitals of different energies to form new orbitals is known as hybridisation and the new orbital formed are known as hybrid oribitals. They have similar energy.

  • Question 7/10
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    In Alcohols, Bond Angle is slightly __________ than the tetrahedral angle?
    Solutions

    The bond angle in alcohols is slightly less than the tetrahedral angle (109-28’). It is due to the repulsion between the unshared electron pairs of oxygen.

    Thus, Option A is the correct answer.

  • Question 8/10
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    Bond Angle is the angle between __________________?
    Solutions

    Bond Angle: It is defined as the angle between the orbitals containing bonding electron pairs around central atom in a molecule / complex ion.

    Thus, Option C is the correct answer.

  • Question 9/10
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    _______is a polar covalent bond.
    Solutions
    • P-Cl is a polar covalent bond.
    • In polar covalent bond shared electrons are much closer to the oxygen nucleus due to the higher electronegativity difference.
    • Chlorine has a higher electronegativity than phosphorus. This means chlorine is better at pulling over electrons in a bond to create a polar bond.
  • Question 10/10
    1 / -0.33

    As compared to ionic compounds, covalent bond has ?
    Solutions

    Covalent compounds have weak forces of attraction between the binding molecules. Thus less energy is required to break the force of bonding. Therefore, covalent compounds have low melting and boiling point.

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