GATE BT Classical thermodynamics and Bioenergetics PYQs & Answers

Questions 1–10 of 19. Imported answers require independent review unless marked reviewed.

Given below is the Gibbs free energy change (ΔG) in kilo Joules per electron equivalent (kJ e⁻eq⁻¹) at pH 7.0, of organic and inorganic half reactions.

Acetate synthesis:

ΔG=27.4 kJ e⁻eq⁻¹

Reduction reaction:

ΔG = -78.72 kJ e⁻eq⁻¹

The free energy change of acetate oxidation to CO₂, H₂O and HCO₃⁻ is _____ kJ e⁻eq⁻¹. (rounded off to two decimal places)

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An enzyme-catalyzed reaction is found to have

. Which of the following statements about this reaction is/are true?

Your answerSelect all correct options. You can choose more than one.

The rate of the reaction cannot be predicted

The rate of the reaction is high

The rate of the reaction is low

The reaction is irreversible

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For a mechanically reversible isobaric process taking place in a closed system involving 5 moles of an ideal gas, the temperature increases from an initial value of 300 K to a final value of 450 K. If the specific heat capacity at constant volume (Cᵥ) is given as 12.5 J mol⁻¹ K⁻¹ and gas constant is 8.314 J mol⁻¹ K⁻¹, the amount of heat transferred to the system will be _____ J.

(Round off to the nearest integer)

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A binary mixture of benzene and toluene under vapour-liquid equilibrium at 80 °C follows ideal Raoult’s law. At this condition, the saturation pressures of benzene and toluene are 101 kPa and 40 kPa, respectively. If the mole fraction of benzene in the liquid phase is 0.6, the corresponding mole fraction of benzene in the vapour phase will be ______.

(Round off to two decimal places)

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For the coupled reactions given below

Glucose 6-phosphate + H

O → Glucose + P

(Reaction 1) ATP + Glucose → ADP + Glucose 6-phosphate (Reaction 2)

the standard free energy change of ATP hydrolysis at 25 °C is ____ kJ/mol. The equilibrium constants for Reaction 1 and Reaction 2 are 360 and 800, respectively. Gas constant R = 8.314 J mol

(Round off to two decimal places)

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Which one of the following statements is correct in the context of thermodynamics?

Your answerChoose one option.

In a closed system, neither mass nor energy is transferred across the system boundary

In a closed system, both mass and energy can be transferred across the system boundary

The total energy of the system is the sum of kinetic and potential energies

In a closed system, only energy can be transferred across the system boundary and not mass

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The free energy change of ATP hydrolysis at 25 °C is -32.2 kJ mol

. The free energy change for hydrolysis of α-glycerophosphate to glycerol is -8.2 kJ mol

at 25 °C. Using the above information, the free energy change for the formation of α-glycerophosphate from glycerol and ATP is ______ kJ mol

(Answer in integer).

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E. coli cultivated at 298 K uptakes an uncharged compound (A) by passive diffusion. The intracellular and extracellular concentrations of A are 0.001 M and 0.1 M, respectively. If the value of the ideal gas constant R is 1.9872 cal.mol

, the free-energy change (in kcal.mol

) for this passive diffusion of A (rounded off to two decimal places) is __________.

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The binding free energy of a ligand to its receptor protein is −11.5 kJ mol

at 300 K. What is the value of the equilibrium binding constant?

Use R = 8.314 J mol

Your answerChoose one option.

0.01

1.0

4.6

100.5

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For a pure species, the slope of the melting line

at −2 °C is −5.065×10

Pa K

. The difference between the molar volumes of the liquid and solid phase at −2 °C is −4.5×10

mol

. The value of the latent heat of fusion (rounded off to nearest integer) is ________________ J mol

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GATE BT Classical thermodynamics and Bioenergetics PYQs

How to practice Classical thermodynamics and Bioenergetics

Question 34

Question 50

Question 29

Question 57

Question 65

Question 13

Question 57

Question 50

Question 15

Question 35