NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 15 - 20 of 1259

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Question number: 15

» Chemical Thermodynamics » Second Law of Thermodynamics » Standard Gibbs Energy Change

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MCQ▾

Question

Equilibrium constant for the the Standard Gibbs free energy change for the reaction is?

Choices

Choice (4)Response

a.

-4.964 k J

b.

-6.496 k J

c.

-9.694 k J

d.

-6.964 k J

Question number: 16

» Chemical Thermodynamics » Types of Processes

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MCQ▾

Question

A process in which pressure remains constant is called?

Choices

Choice (4)Response

a.

Isochoric

b.

Adiabatic

c.

Isothermal

d.

Isobaric

Question number: 17

» Chemical Thermodynamics » First Law of Thermodynamics » Enthalpy

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MCQ▾

Question

The compounds which have negative enthalpies of formation are known as

Choices

Choice (4)Response

a.

endothermic compounds

b.

exothermic compounds

c.

allotropic compounds

d.

isothermal compounds

Question number: 18

» Chemical Thermodynamics » First Law of Thermodynamics » Work

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MCQ▾

Question

Calculate the maximum work done in expanding the 16g of Oxygen at 300 K and occupying a volume of 5 dm3 isothermally until the volume becomes 25 dm3.

Choices

Choice (4)Response

a.

0.20X103J

b.

2.01X103J

c.

-0.20X103J

d.

-2.01X10 3J

Question number: 19

» Chemical Thermodynamics » Second Law of Thermodynamics » Standard Gibbs Energy Change

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MCQ▾

Question

In the reaction A + + B → A + B + , there is no change of entropy. If enthalpy change is 22 KJ of A +. . Calculate Gibbs free energy change for the reaction. ?

Choices

Choice (4)Response

a.

22 k J/mol

b.

42 k J/mol

c.

- 42 k J/mol

d.

-22 k J/mol

Question number: 20

» Chemical Thermodynamics » Extensive and Intensive Properties

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MCQ▾

Question

Calculate the maximum efficiency of an engine operating between 100°C and 25°C?

Choices

Choice (4)Response

a.

10 %

b.

20 %

c.

40 %

d.

30 %

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