1 ) An ideal gas obeying kinetic gas equation . . . . . . . . . . . . . . . liquefied at any value of P and T .
A ) can be ,
B ) cannot be ,
C ) None of these ,
Correct Answer : - B ) cannot be ,
Because ideal gas obeys PV = nRT , so that real gas can be liquefied .
2 ) kinetic energy of one mole of an ideal gas at 300K in kj is : -
A ) 2.74 kJ . B ) 3.00 kJ .
C ) 3.74 kJ . D ) None of these ,
Correct Answer : - C ) 3.74 kJ .
Solution : -
formula : -
K.E = ( 3 / 2 ) n R T = ( 3 / 2 ) ( 1 ) ( 8.314 ) ( 300 ) .
K.E = 3741.3 J = 3.74 kJ , Answer .
3 ) Le - chateliers principle is an observation about changes in . . . . . . . . . . . . . . of system .
A ) temperature and pressure , B ) volume ,
C ) concentration , D ) All of these ,
Correct Answer : - D ) All of these ,
4 ) In Rutherford scattering experiment , most of the electrons pass through the gold . . . . . . . . . . . . . . . ( un – deflected ) and proved that atom is mostly empty .
5 ) Find the average speed of oxygen molecules in the air at STP ?
A ) 5 m / s , B ) 15 m / s ,
C ) 25 m / s , D ) None of these ,
Correct Answer : - B ) 15 m / s ,
Solution : -
Formula : -
v = √(3RT/M) .
M = 32 , R = 8.314 J / mol. , T = 273 K
v = √( 3 x 8.314 x 273 / 32 ) = 15 m / s , Answer .
6 ) A gaseous mixture contains oxygen and hydrogen in ratio 1 : 4 by weight . Therefore the ratio of no. of molecules : -
A ) 1 / 32 , B ) 7 / 16 ,
C ) 7 / 32 , D ) None of these ,
Correct Answer : -
Now go to online quiz section and Chemistry Quiz 4 is uploaded related to these mcqs , so check your preparation by this link : -
 An ideal gas obeying kinetic gas equation . . . . . . . . . . . . . . . liquefied at any value of P and T . A ) can be , B ) cannot be , C ) None of these ,){kind=link}
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