STATES OF MATTER Quiz-9

STATES OF MATTER QUIZ-9

Dear Readers,

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.

Q1. To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mole of He and 1.0 mole of an unknown compound (vapour pressure 0.68 atm at0℃) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0℃ is close to

•  3
•  5
•  7
•  9

Solution:

Q2. What weight of hydrogen at STP could be contained in a vessel that holds 4.8 g oxygen at STP?

•  4.8 g
•  3.0 g
•  0.6 g
•  0.3 g

Solution:

Q3.  A gas in an open container is heated from 27°C to 127°C. The fraction of the original amount of the gas remaining in the container will be

•  3/4
•  1/2
•  1/4
•  1/8

Solution:

Q4.  Which of following correctly represents the relation between capillary rise h ad capillary radius r?

• 
• 
• 
• 

Solution:

Q5.Equal weights of methane and oxygen are mixed in an empty container at 25℃. The fraction of the total pressure exerted by oxygen is

•  1/3
•  1/2
•  2/3
•  1/3 × 273/298

Solution:

Q6. The ratio between the root mean square speed of H₂ at 50 K and that of O₂ at 800 K is

•  4
•  2
• 1
•  1/4

Solution:

Q7.A graph is plotted between log⁡V and log⁡T for 2 mol of gas at constant pressure of 0.0821 atm. VandT are in litre and K. Which of the following statements are not correct?

1. The curve is straight line with slope -1
2. The curve is straight line with slope +1
3. The intercept on Y-axis is equal to 2
4. The intercept on Y-axis is equal to 0.3010

•  I, II
•  III, IV
•  II, IV
•  I, III

Solution:

Q8.A mixture of SO₂ and O₂ in the molar ratio 16:1 is diffused through a pin hole for successive effusions three times to give a molar ratio 1:1 of diffused mixture. Which one are not correct if diffusion is made at same P and T in each operation?

1. Eight operation are needed to get 1:1 molar ratio
2. Rate of diffusion for SO₂ : O₃ after eight operations in 0.707
3. Six operations are needed to get 2:1 molar ratio for SO₂ and O₂ in diffusion mixture
4. Rate of diffusion for SO₂ and O₂ after six operations is 2.41

•  I,II,III
•  II,III
•  I,III
•  IV

Solution:

Q9.In van der Waals equation of state for a non-ideal gas, the term that accounts for intermolecular forces is

•  V-b
•  RT
•  p+a/V²
•  (RT)^-1

Solution:

Q10. In the van der Waals equation

•  b is the volume occupied by the gas molecules
•  b is four times the volume occupied by the gas molecules
•  b is the correction factor for intermolecular attraction
•  None of these

Solution: