Which one of the following is good conductor of electricity
Assertion : Effusion rate of oxygen is smaller than nitrogen.
Reason : Molecular size of nitrogen is smaller than oxygen.
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..
The root mean square speeds at STP for the gases H2 , N2 ,O2 and HBr are in the order
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 ..
Davy and Faraday proved that
2gm of O2 at 27Â°C and 760mm of Hg pressure has volume
1Â° C rise in temperature is equal to a rise 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
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..
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..
Pressure of a gas in a vessel can be measured by
Assertion : We air is heavier than dry air.
Reason : The density of a dry air is more than density of water.
Dulong and Petits law is valid only for
Pressure remaining the same, the volume of a given mass of an ideal gas increases for every degree centigrade rise in temperature ..
Assertion : All molecules in a gas have same speed.
Reason : Gas contains of different size and shape
If P, V, M, T, and R are pressure, volume, molar mass, temperature and gas constant respectively, then for an ideal gas, the dens..
At constant temperature,in a given mass of an ideal gas
Correct gas equation is
Which one of the following Statements is not correct about the three states of matter i.e. solid, liquid and gaseous
Kinetic energy of molecules is highest in
If the pressure and absolute temperature of 2 litres of CO2 are doubled, the volume of CO2 would become
Quartz is are crystalline variety of
The substance which does not show sharp melting point is
Among solids the highest melting point is established by
A crystalline solid
The temperature and pressure at which ice, liquid water and water vapour can exist together are
A volume of 1 m3 is equal to
With which one of the following elements silicon should be doped so as to give p-type of semiconductor
A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely dis..
Molecules/ions and their magnetic properties are given below
Which of the following statements is wrong for gases
Which of the following exhibits the weakest intermolecular forces
Which of the following is true about gaseous state
Which of the following relations for expressing volume of a sample is not correct
Which of the following is ferroelectric compound
The lustre of a metal is due to
The ability of a given substance to assume two or more crystalline structure is called
To get a n-type semiconductor, the impurity to be added to silicon should have which of the following number of valence electrons ..
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