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Liquid & solids: FSC LEVEL

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    Special Member mis nazma's Avatar
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    Liquid & solids: FSC LEVEL

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    Chemistry:

    Liquid & solids

    1. Chloroform and acetone are soluble in each other due to:
    (A) Instantaneous dipole interactions
    (B) Dipole – dipole interactions
    (C) Intermolecular hydrogen bonding
    (D) All of above

    2. Force of attraction between atoms of He is:
    (A) London dispersion forces
    (B) Hydrogen bonding
    (C) Coordinate covalent bond
    (D) Covalent bond

    3. The only forces are London dispersion forces among the :
    (A) Atoms of He in gaseous state at high temperature
    (B) Molecules of water in liquid state
    (C) Molecules of solid 12
    (D) Molecular of hydrochloric acid gas

    4. The density of water decreases, when it is freeze at 0ᵒC because of:
    (A) Change of bond lengths
    (B) Changes of bond angles
    (C) Cubic structure of ice
    (D) Empty spaces present in the structure of ice

    5. Which one of the following is the weakest intermolecular force:
    (A) Dipole induced dipole forces
    (B) Ionic dipole forces
    (C) Electrostatic forces between ions
    (D) Dipole- dipole forces

    6. The gases can be converted into liquids by:
    (A) Increasing the pressure only
    (B) Lowering temperature and increasing pressure
    (C) Increasing pressure and bringing temperature below critical point
    (D) Lowering temperature only

    7. The intermolecular forces in liquids are:
    (A) Negligible
    (B) Very weak
    (C) Very strong
    (D) Reasonably strong

    8. London dispersion forces are also called:
    (A) Hydrogen bonding
    (B) Debye forces
    (C) Van der Wall’s forces
    (D) Instantaneous dipole-induced dipole forces

    9. In a group on going downward, polarizability generally:
    (A) Decreases
    (B) Increases
    (C) Remain constant
    (D) Negligible

    10. Hydrocarbon molecules with large chain lengths experience:
    (A) Weaker attractive forces
    (B) Stronger attractive forces
    (C) Repulsive forces
    (D) No attractive forces

    11. HF has exceptionally low acidic strength due to:
    (A) Smaller size of fluorine
    (B) Strong polar bond between H and F
    (C) Electronegativity of fluorine
    (D) Strong hydrogen bonding

    12. Polypeptide chains are called about one another into a spiral by:
    (A) Ionic bonds
    (B) Covalent bonds
    (C) Van der Waal’s forces
    (D) Hydrogen bonds

    13. The strongest forces are:
    (A) Debye forces
    (B) London dispersion forces
    (C) Dipole-dipole attraction
    (D) Hydrogen bonding

    14. Hydrogen bonding is present between the molecules of:
    (A) NH3
    (B) H2O
    (C) HF
    (D) All of above

    15. H2S is a gas while H2O is liquid at room temperature. It is due to:
    (A) Less intermolecular forces in water
    (B) Covalent bond in H-O in water molecule
    (C) Hydrogen bonding in water molecules
    (D) Ionic characters in water molecules

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    iTT Student red mano's Avatar
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    Re: Liquid & solids: FSC LEVEL

    Liquid & solids very important chapter


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