A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely dis..
Assertion : 4.58mm and 0.0098Â°C is known to be triple point of water.
Reason : At this pressure and temperature all the three s..
Which one of the following Statements is not correct about the three states of matter i.e. solid, liquid and gaseous
The root mean square speeds at STP for the gases H2 , N2 ,O2 and HBr are in the order
The characteristic features of solid are
Davy and Faraday proved that
The 8 : 8 type of packing is present in
Which one of the following is good conductor of electricity
A compound is formed by elements A and B. This crystallises in the cubic structure where the A atoms are at the corners of the cub..
Which of the following relations for expressing volume of a sample is not correct
A solid compound contains X , Y and Z atoms in a cubic lattice with X atom occupying the corners. Y atoms in the body centred posi..
In a cubic structure of diamond which is made from X and Y, where X atoms are at the corners of the cube and Y at the face centres..
At constant temperature,in a given mass of an ideal gas
A crystalline solid have
For orthombic system axial ratios are a#b#c and the axial angles are
With which one of the following elements silicon should be doped so as to give p-type of semiconductor
Pressure remaining the same, the volume of a given mass of an ideal gas increases for every degree centigrade rise in temperature ..
The substance which does not show sharp melting point is
Dulong and Petits law is valid only for
If the pressure and absolute temperature of 2 litres of CO2 are doubled, the volume of CO2 would become
The number of carbon atoms per unit cell of diamond is
A solid has a structure in which, atoms of W, O and Na are located respectively at the corners, centre of edge and at the centre o..
In the solid state, MgO has the same structure as that of sodium chloride. The number of oxygens surrounding each magnesium in MgO..
The temperature and pressure at which ice, liquid water and water vapour can exist together are
A crystalline solid
if 10^4 dm ^3 of water is introduced into a 1.0 dm^3 flask at
Quartz is are crystalline variety of
Which type of solid crystals will conduct heat and electricity
The ability of a given substance to assume two or more crystalline structure is called
Crystalline solids are
A volume of 1 m3 is equal to
Which one of the following metal oxides is antiferromagnetic in nature
Among solids the highest melting point is established by
Which of the following statements is wrong for gases
Which of the following is ferroelectric compound
Pressure of a gas in a vessel can be measured by
Kinetic energy of molecules is highest in
Correct gas equation is
Which of the following exhibits the weakest intermolecular forces
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