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Quiz 21
Mdcat-past-papers Quiz
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401. The kinetic molecular theory of gases explains:
Mass number
The behaviour of gases
Atoms number
Electron
402. The average distance covered by the gas molecule between successive collisions is known
Free path
Mean free path
Total free path
Total path
403. Collision shown by gases involve the following:
No energy change
small energy change
No pressure change
large energy change
404. Equation PV = 1/3 mNc² is called:
ideal gas
Kinetic
Vander walls
Henderson
405. Increasing the compressibility of a gas (Z) decreases its:
Pressure
Temperature
Volume
Concentration
406. The actual volume of gas molecules is considered negligible of following pressure:
2atm
6atm
4atm
8atm
407. The idea that molecules in gases are in constant movement is called:
Kinetic theory of gases
Molecular orbital theory
Crystal field theory
Transition state theory
408. The relationship between the absolute temperature and the velocities of gas molecules is given by:
C_rms = √(3RT/M)
V= √(2Ek/m)
PV = nRT
PV = 1/3 m Nc²
409. There are four gases H₂,He,N₂ and CO₂ , Which gas shows greater nonideal behavior?
He
H₂
CO₂
N₂
410. The real gases show deviation from ideal behavior at:
Low temperature and low pressure
Low temperature and high pressure
High temperature and low pressure
High temperature and high pressure
411. Gases deviate from ideal behavior more:
At low temperature & high pressure
Both temperature & pressure low
Both temperature & pressure High
At high temperature & low pressure
412. Which of the following temperatures is referred to as the absolute zero?
-273.16°C
0 °C
-273.16°K
32 °F
413. The real gases show deviation from ideal behaviour at:
low temperature & low pressure
Low temperature & high pressure
High temperature & low pressure
Not visible in the image.
414. Which of the following shows marked deviation from ideal behaviour at a given temperature and pressure?
CO₂
He
N₂
H₂
415. In which of the following compound hydrogen bond is not present?
H₂O
HF
CH₄
NH₃
416. Which of the following is the most ideal gas?
H₂
N₂
O₂
He
417. Melting point of water is higher than petrol, because intermolecular forces of water are:
Weaker than petrol
Stronger than petrol
Same as in petrol
Negligible
418. London dispersion forces are the only forces present among them:
Molecules of H₂O in liquid state.
Molecules of HCl gas
Atoms of He in gaseous state at high temperature.
Molecules of solid state
419. In liquid, with the change in dipole-dipole forces, there is a change in some physical properties. Select the property which is not affected by the strength of dipole-dipole forces?
Boiling Point
Heat of vaporization
heat of sublimation
moles
420. Intermolecular forces between molecules of ideal gas are:
Strong
Moderate
Weak
Absent
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