Why an ideal gas cannot be liquefied ?
its critical temperature is always above 0oC.
its molecules are relatively smaller in size.
it solidifies before becoming a liquid.
forces operating between its molecules are negligible.
What is the correct value of the gas constant 'R' from the following ?
0.082 L- atm K
0.082 L- atm K -1 mol-1
0.082 L atm Kmol-1
0.082 L-1 atm-1 K mol
A balloon blown up with 1 mole of gas has a volume of 480 mL at 5ºC. The balloon is filled to 7/8th of its maximum capacity. Will the balloon burst at 30ºC?
Balloon will burst
Balloon will not burst
Bursting of balloon is independent of temperature
Cannot be predicted
How many unit cells are present in a cube shaped ideal crystal of NaCl of mass 1.00 g?
2.57 x 1021
5.14 x 1021
1.28 x 1021
1.71 x 1021
Through the two ends of a glass tube of length 200 cm HCl gas and NH3 are allowed to enter. At what distance the white ring of ammonium chloride will first appear?
81.1 cm from HCl end
81.1 cm from NH3 end
118.9 cm from HCl end
The ring will not form
According to the kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecule travels
in a circular path
in a wavy path
in a straight line path
with an accelerated velocity
At which condition, van der Waals real gas act as an ideal gas ?
High temperature, low pressure
Low temperature, high pressure
High temperature, high pressure
Low temperature, low pressure
Which among the following statement is correct regarding the gas equation PV= nRT ?
n is the number of molecules of a gas
V denotes volume of one mole of the gas
n moles of the gas have a volume V.
P is the pressure of the gas when only one mole of the gas is present.
A mixture of NH3(g) and N2H4(g) is placed in a sealed container at 300K. The total pressure is 0.5 atm. When the container is heated to 1200 K, both substances decompose completely according to the equations :
2NH3 (g) → N2(g) + 3H2(g)
and N2H4(g) → N2(g) + 2H2(g)
After decomposition, the total pressure at 1200 K is found to be 4.5 atm. What is the percent of N2H4(g) in the original mixture? (assuming ideal behaviour)
35%
40%
75%
25%
Which of the following gives the correct relation between internal energy and pressure of a gas per unit volume ?
P= 2/3 E
P= 3/2E
P=1/2 E
P= 2E
