A pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature, and still at higher temperature turbidity completely disappears. This behaviour is a characteristic of substances forming:
allotropic crystals.
liquid crystals.
isomeric crystals.
isomorphous crystals.
In van der Waals' equation of state for a non - ideal gas, the term that accounts for inter molecular forces is:
(V - b )
(RT)-1
RT
The constant the temperature in a given mass of an ideal gas:
the ratio of pressure and volume always remains constant.
volume always remains constant.
pressure always remains constant.
the product of pressure and volume always remains constant.
Most crystals show good cleavage because their atoms, ions or molecules are:
weakly bonded together.
strongly bonded together.
spherically symmetrical.
arranged in planes.
The correct value of the gas constant 'R' is close to:
0.082 L-atm K
0.082 L-atm K-1 mol-1
0.082 L-atm-1 K mol-1
0.082 L-1 atm -1 K mol
Which is NOT true in case of an ideal gas?
It cannot be converted into a liquid.
There is no interaction between the molecules.
All molecules of the gas move with same speed.
At a given temperature, pV is proportional to the amount of the gas.
