Q. Which pair of molecules has the strongest dipole-dipole interactions?
Intermolecular forces can be out of the following:
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Based on the following statements I and IS, select the correct answer from the codes given.
Statement I : Three states of matter are the result of balance between intermolecular forces and thermal energy of the molecules.
Statement II : Intermolecular forces tend to keep the molecules together but thermal energy of molecules tends to keep them apart.
In comparing gases with liquids , gases have ........ compressibility and...........density.
Van der waals forces include the following except
Dipole-dipole interaction energy between stationary polar molecules is proportional to x and that between rotating molecules is proportional to y. Assume distance between polar molecules as r, then x and y are
Direction (Q. Nos. 7-10) This section contains 4 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THANT ONE is correct.
Q. Select the correct alternate(s).
The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles but their magnitude depends upon
Hydrogen bonding reduces the quality of water molecules to
Atom which must be present in hydrogen bonding is
Direction (Q. Nos. 11-13) This section contains a paragraph, wach describing theory, experiments, data etc. three Questions related to paragraph have been given.Each question have only one correct answer among the four given options (a),(b),(c),(d)
Dipole-dipole forces act between the molecules possessing permanent dipole. Ends of dipoles possess ‘partial charges’. The partial charge is
Stronger intermolecular forces result in higher boiling point. Strength of London forces increases with number of electrons in the molecule. Boiling point of
I. HF 293 K
II. HCl 189 K
III. HBr 206 K
IV. HI 238 K
Q.
Based on the boiling points, predominant force which gives variation of boiling point of HCI < HBr < HI is
Stronger intermolecular forces result in higher boiling point. Strength of London forces increases with number of electrons in the molecule. Boiling point of
I. HF 293 K
II. HCl 189 K
III. HBr 206 K
IV. HI 238 K
Q.
HF has highest boiling point because of
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