States of Matte...

Q. Which pair of molecules has the strongest dipole-dipole interactions?

Intermolecular forces can be out of the following:

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

1 mole of chlorine and 1 mole of hydrogen were taken in a 10 L evacuated flask along with a little charcoal. The flask was then irradiated with light until the reaction was complete. Subsequently, 5L of water was introduced into the flask and the flask was cooled to 27° C. The pressure exerted by the system is approximately equal to: 
[Aqueous tension at 27° C = 26 mm]

 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