States of Matter - Online Test
Q1. Gay Lussac’s law states that at constant volume, pressure of a fixed amount of a gas
Answer : Option A
Explaination / Solution:
P α T (at constant V).
Q2. Avogadro law states that
Answer : Option B
Explaination / Solution:
Equal volumes of all gases under the same conditions of temperature and pressure contain equal number of molecules. This is Avagadros Law.
Q3. Which of the following is the correct ideal gas law
Answer : Option D
Explaination / Solution:
PV=nRT is the correct Ideal Gas equation.
Here, P : Pressure
V : Volume
n : Number of Moles
R : Universal Gas Constant
T : Temperature
Q4. Increase in kinetic energy can overcome intermolecular forces of attraction. How will the viscosity of liquid be affected by the increase in temperature?
Answer : Option D
Explaination / Solution:
Viscosity is inversely proportional to temperature., hence viscosity of the given liquid decreases with rise in temperature since, the liquid particles can move more freely as the friction between them become lesser.
Q5. Dalton’s Law of Partial Pressures states that the total pressure exerted by the mixture of non-reactive gases is equal to the
Answer : Option D
Explaination / Solution:
The question is based on the statement of Dalton Law of Partial pressures for Gases which states that total pressure exerted by mixture of non reacting gases is equal to the sum of partialpressure of individual gases.
Q6. In the kinetic molecular theory attraction between molecules of the gas is
Answer : Option D
Explaination / Solution:
The Kinetic Theory of Gases assumes that no intermolecular forces exerts between the gas molecules.
Q7. Real gases show deviations from ideal gas law because
Answer : Option D
Explaination / Solution:
Real gases have intermolecular forces of interaction due to which there is a difference in the actual pressure values when compared to the ideal gases, the pressure is found to be less than the pressure of ideal gases under similar conditions, similar deviation occurs when the size of molecules is taken into account due to which volume correction is required.
Q8. Which is the correct form of van der Waals equation?
Answer : Option A
Explaination / Solution:
is vanderwall gas equation of real gases.
Q9. The deviation from ideal behavior can be measured in terms of compressibility factor Z, which is
Answer : Option A
Explaination / Solution:
Z=PV/nRT, is a correction factor which describe the deviation of real gas from ideal gas behaviour. it is defined as the ratio of the molar volume of a gas to the molar volume of an ideal gas at the same temperature and pressure.
Q10. behaviour of the gas becomes more ideal when
Answer : Option D
Explaination / Solution:
This question is based on understanding the concept of molecular interactions between molecule of real gases which is least at low P and High T condition. Thus under these conditions real gases behave as ideal.
