States of Matter

R.J Clausius deduced an equation for the pressure of an ideal gas from the

postulates of kinetic theory. This equation is called kinetic equation, the correct

mathematical form of it is

• PV= 1/2mNc- 2

• PV= 1/3mNc- 2

• PV = nRT

• pv=1/3Nc-2

Which of the following is equal to –12°C temperature

• 285 K

• –261 K

• –12 K

• 261 K

If 50cm3 of a gas in a syringe at 15°C is heated to 50°C and the piston of syringe is

allowed to move outwards against constant atmospheric pressure, the new volume ofthe hot gas will be _______

• 50cm3

• 44cm3

• 40cm3

• 56cm3

Select the correct formula for determination of molecular mass from ideal equation(W and m are used for mass of gas)

• .M = MPW/

  RT

• M = WRT/

  PV

• M= MRT/

  PV

• both b and c

At 17°C, a sample of H2 gas occupies 125cm3. What would be the volume at 307°C by keeping pressure constant

• 125cm3

• 250cm3

• 415cm3

• 350cm3

Volume of a gas at STP is 10 dm3, at what temperature its volume will become

30dm3, keeping pressure constant

• 3°C

• 819°C

• 3K

• 819K

A real gas behaves ideally at

• High pressure, low temperature

• High pressure, high temperature

• Low pressure, high temperature

• Low pressure, low temperature

At constant temperature volume of the given mass of a gas is directly proportional

to the inverse of pressure exerted on it, is called

• General gas law

• Charles’s law

• Boyle’s law

• Avogadro’s law

If temperature and pressure of 4dm3 of hydrogen is reduce to half, then new volumeof gas will be

• 8dm3

• 4dm3

• 6dm3

• 2dm3

Which of the following is more ideal gas at 100 C temperature and constant

pressure?

• He

• N2

• H2

• CO2