Question: Pick out the wrong unit conversion ?

• 1. 1 atm. = 760 mm Hg = 29.92 inch Hg = 14.7 psi = 1.013 bar = 1.013 kgf/cm2
• 2. 1 kPa = 100 bar
• 3. 1 mm Hg = 1 torr = 133.3 Pa
• 4. None of these

Question: “The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?

• 1. Law of Petit and Dulong
• 2. Kopp’s rule
• 3. Nernst heat theorem
• 4. Trouton’s rule

Question: If an ideal solution is formed by mixing two pure liquids in any proportion, then the ___________________ of mixing is zero?

• 1. Enthalpy
• 2. Volume
• 3. Both A & B
• 4. Neither A nor B

Question: The temperature at which both liquid and gas phases are identical, is called the _____________ point?

• 1. Critical
• 2. Triple
• 3. Freezing
• 4. Boiling

Question: Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will_________________?

• 1. Increase
• 2. Decrease
• 3. Remain unchanged
• 4. First fall and then rise

Question: Joule-Thomson co-efficient for a perfect gas is_____________________?

• 1. Zero
• 2. Positive
• 3. Negative
• 4. None of these

Question: Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be__________________?

• 1. 580
• 2. 640
• 3. 1160
• 4. Data insufficient; can’t be computed

Question: In the ammonia synthesis reaction, N2 + 3H2 ⇌ 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by___________________?

• 1. High temperature
• 2. Low pressure
• 3. Low temperature only
• 4. Both low temperature and high pressure

Question: What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope ?

• 1. 0
• 2. 2
• 3. 1
• 4. 3

Question: What is the value of ln y (where y = activity co-efficient) for ideal gases ?

• 1. Zero
• 2. Unity
• 3. Infinity
• 4. Negative