Intermolecular forces are forces of attraction and repulsion between interacting particles that will be: 
A. dipole - dipole forces 
B. dipole-induced dipole forces 
C. hydrogen bonding 
D. covalent bonding 
E. dispersion forces 
Choose the most appropriate answer from the options given below: 
1. A, C, D, E are correct 
2. B, C, D, E are correct 
3. A, B, C, D, E are correct 
4. A, B, C, E are correct 
Subtopic:  Introduction to States of Matter |
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Which amongst the following options is correct graphical representation of Boyle's Law?    
1. 2.
3. 4. -
Subtopic:  Gas Laws |
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The correct van der Waals equation for 1 mole of a real gas is: 
1. \((P+{a \over V^2})(V-b) =RT\)
2. \((P+{V^2 \over a})(V-b) =RT\)
3. \((P+{an^2 \over V^2})(V^2-nb) =RT\)
4. \((P+{an^2 \over V})(V-nb) =nRT\)
Subtopic:  van der Waal’s Correction |
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The correct option in which the density of argon (Atomic mass =40) is highest: 
1. STP 2. 0°C, 2 atm
3. 0°C, 4 atm 4. 273°C, 4 atm
Subtopic:  Gas Laws |
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Which one is not the correct mathematical equation for Dalton's Law of partial pressure?
(Here p = total pressure of a gaseous mixture)
 
1. \(p_i=\chi_ip^o_i,\) where \(\chi_i=\) mole fraction of \(i^\text{th}\) gas in a gaseous mixture
   \(p_{i}^{o}=\) pressure of \(i^\text{th}\) gas in a pure state
2. \(\mathrm{p}=\mathrm{p}_{1}+\mathrm{p}_{2}+\mathrm{p}_{3} \)
3. \(\mathrm{p}=\mathrm{n}_{1} \frac{\mathrm{RT}}{\mathrm{V}}+\mathrm{n}_{2} \frac{\mathrm{RT}}{\mathrm{V}}+\mathrm{n}_{3} \frac{\mathrm{RT}}{\mathrm{V}}\)
4. \(\mathrm{p}_{i}=\chi_{i} \mathrm{p} \), where \(\mathrm{p}_{i}=\) partial pressure of \(i^\text{th}\) gas
    \(\chi_i=\) mole fraction of \(i^\text{th}\) gas in a gaseous mixture
Subtopic:  Dalton's Law |
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A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume \(O_2\) gas is behaving ideally). The pressure inside the flask in the bar is:
(Given R = 0.0831 L bar K-1 mol-1)
1. 4.9 
2. 2.5 
3. 498.6
4. 49.8
Subtopic:  Ideal Gas Law |
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Which of the following is not correct about postulates of the kinetic molecular theory of gases?

1 .   Pressure of the gas is due to the collision of molecules against the walls of the container.
2. Volume of the gas is due to the large number of molecules of the gas.
3.  Average kinetic energy of molecules is directly proportional to the absolute temperature of the gas.
4.  The molecules move randomly with different speeds in different directions.

Subtopic:  Kinetic Theory of Gas |
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At 300 K, 250 mL of gas A at 1 bar pressure is mixed with 500 mL of a gas B at 2 Bar pressure in a 1.0 L flask. Gas A does not react with gas B. The final pressure of the mixture is-
1. 1.00 bar 
2. 2.15 bar 
3. 2.50 bar 
4. 1.25 bar 

Subtopic:  Dalton's Law |
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Four gas cylinders containing He, N2, CO2, and NH3 gases, separately, are gradually cooled from a temperature of 500 K. Which gas will liquify first?

(Given TC in K – He : 5.3, N2 : 126, CO2 : 304.1 and NH3 : 405.5)

1. He
2. N2
3. CO2
4. NH3
Subtopic:  Liquefaction of Gases & Liquid |
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A vessel contains 3.2 g of dioxygen gas at STP (273.15 K and 1 atm pressure). The gas is now transferred to another vessel at a constant temperature, where pressure becomes one-third of the original pressure. The volume of the new vessel in L is:
(Given - molar volume at STP is 22.4 L)
1.  6.72
2.  2.24
3.  22.4
4.  67.2
Subtopic:  Gas Laws |
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