Equal amounts of two gases of molecular weight 4 and 40 are mixed. The pressure of the mixture is 1.1 atm. The partial pressure of..
In a closed flask of 5 litres, 1.0 g of H2 is headed from 300 to 600 K. Which statement is not correct
Assertion : Effusion rate of oxygen is smaller than nitrogen.
Reason : Molecular size of nitrogen is smaller than oxygen.
A weather ballon filled with hydrogen at 1 atm and 27Â° C has volume equal to 12000 litres. On ascending it reaches a place wher..
A particular solid is very hard and has a high melting point. In solid state it is a non conductor and its melt is a conductor of ..
The characteristic features of solid are
Which one of the following is good conductor of electricity
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..
Molecules/ions and their magnetic properties are given below
Assertion : All molecules in a gas have same speed.
Reason : Gas contains of different size and shape
A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely dis..
The root mean square speeds at STP for the gases H2 , N2 ,O2 and HBr are in the order
Which one of the following Statements is not correct about the three states of matter i.e. solid, liquid and gaseous
Assertion : We air is heavier than dry air.
Reason : The density of a dry air is more than density of water.
Davy and Faraday proved that
At constant temperature,in a given mass of an ideal gas
A crystalline solid have
If the pressure and absolute temperature of 2 litres of CO2 are doubled, the volume of CO2 would become
Dulong and Petits law is valid only for
The temperature and pressure at which ice, liquid water and water vapour can exist together are
Which one of the following metal oxides is antiferromagnetic in nature
A crystalline solid
Pressure remaining the same, the volume of a given mass of an ideal gas increases for every degree centigrade rise in temperature ..
Quartz is are crystalline variety of
Crystalline solids are
Which of the following relations for expressing volume of a sample is not correct
Pressure of a gas in a vessel can be measured by
Which of the following is ferroelectric compound
A volume of 1 m3 is equal to
The number of carbon atoms per unit cell of diamond is
The ability of a given substance to assume two or more crystalline structure is called
The substance which does not show sharp melting point is
Among solids the highest melting point is established by
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..
Correct gas equation is
Which type of solid crystals will conduct heat and electricity
To get a n-type semiconductor, the impurity to be added to silicon should have which of the following number of valence electrons ..
With which one of the following elements silicon should be doped so as to give p-type of semiconductor
Which of the following statements is wrong for gases
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